Answer:
See explanation.
Explanation:
Hello there!
In this case, for this titration problem, we first need to set up the undergoing chemical equation between barium chloride and hydrochloric acid:
[tex]2HCl+Ba(OH)_2\rightarrow BaCl_2+2H_2O[/tex]
Which occurs in a 2:1 mole ratio of acid to base and thus, we can write the following:
[tex]2n_{base}=n_{acid}[/tex]
Which can be written in molarities and volumes:
[tex]2M_{base}V_{base}=M_{acid}V_{acid}[/tex]
And we solve for the molarity of the acid:
[tex]M_{acid}=\frac{2M_{base}V_{base}}{V_{acid}}[/tex]
Unfortunately, the molarity of the base was not given:
"The molarity of an aqueous solution of hydrochloric acid, , is determined by titration with a M barium hydroxide, , solution. If 31.2 mL of barium hydroxide are required to neutralize 15.4 mL of the acid, what is the molarity of the hydrochloric acid solution?"
Yet we can assume an arbitrary value, say 1.0 M in order to show you the solution so that you can modify it according to your given value:
[tex]M_{acid}=\frac{2(1.0M)(31.2mL)}{(15.4mL)}=4.05M[/tex]
So you just need to modify the (1.0 M) by the actually given molarity of the acid.
Regards!
Aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chloride and liquid water . Suppose 12.8 g of hydrochloric acid is mixed with 7.0 g of sodium hydroxide. Calculate the minimum mass of hydrochloric acid that could be left over by the chemical reaction. Round your answer to significant digits.
Answer:
Mass of HCl leftover = 6.4 g
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
NaOH + HCl —> NaCl + H₂O
Next, we shall determine the masses of NaOH and HCl that reacted from the balanced equation. This can be obtained as follow:
Mass of NaOH = 23 + 16 + 1
= 40 g/mol
Mass of NaOH from the balanced equation = 1 × 40 = 40 g
Molar mass of HCl = 1 + 35.5 = 36.5 g/mol
Mass of HCl from the balanced equation = 1 × 36.5 = 36.5 g
SUMMARY:
From the balanced equation above,
40 g of NaOH reacted with 36.5 g of HCl.
Next, we shall determine the mass of HCl required to react with 7 g of NaOH. This can be obtained as follow:
From the balanced equation above,
40 g of NaOH reacted with 36.5 g of HCl.
Therefore, 7 g of NaOH will react with = (7 × 36.5)/40 = 6.4 g of HCl.
Thus, 6.4 g of HCl is required for the reaction.
Finally, we shall determine the leftover mass of HCl. This can be obtained as follow:
Mass of HCl given = 12.8 g
Mass of HCl that reacted = 6.4 g
Mass of HCl leftover =?
Mass of HCl leftover = (Mass of HCl given) – (Mass of HCl that reacted)
Mass of HCl leftover = 12.8 – 6.4
Mass of HCl leftover = 6.4 g
Given the following set of atoms, write a bond-line formula for a possible constitutional isomer for the compound. Show all formal charges and lone pairs.C atoms H atoms Other3 6 2 Br atoms
Answer:
Explanation:
Isomers are compounds with the same molecular formula but chemically distinctive structures. Compounds that vary in connectivity, or how the component atoms are related to one another, are known as constitutional isomers. They have distinct functional groups and bonding patterns according to the sequence in which the atoms are linked together.
From the information given:
The compound given is C₃H₆Br₂ and the constitutional isomer of the compound can be seen in the image attached below.
The formal charges are calculated as follows:
Formal charge = valence electron - 1/2(bonding electron) - lone electron
For Br:
Formal charge = 7 - 1/2(2) - 6
Formal charge = 7 - 1 - 6 = 0
For C:
Formal charge = 4 - 1/2(8) - 0
Formal charge = 4 - 4 = 0
For H:
Formal charge = 1 - 1/2(2)
Formal charge = 1 - 1 = 0
SCIENCE
11. farmers tend to clear and bum a patch of forest area
Answer:
n8ce question and answer is time taken
How many grams are in 3.7 moles of Na2O?
Answer:
mass = moles x molar mass
m= 3.7 x (23x2+16)
m= 3.7x62
m= 229.4g
198.4 grams are there is 3.7 moles of Na₂O.
The number of moles is defined as the ratio between given mass and molar mass.
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\\\\[/tex]
Given:
Number of moles= 3.7 moles
To find:
Mass=?
Molar mass of Na₂O= 62 g/mol
Thus substituting the values in the given formula
[tex]\text{Given mass}=\text{Number of moles}*\text{Molar mass}\\\\\text{Given mass}= 3.2 \text{moles}*62 \text{g/mol}\\\\\text{Given mass}=198.4 \text{g}[/tex]
Thus, 198.4 grams are there is 3.7 moles of Na₂O.
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Using the following portion of the activity series for oxidation half-reactions, determine which combination of reactants will result in a reaction. Li(s) Al3 (aq) eCr(s) Al3 (aq) 3e75) A) Li(s) with Al(s) B) Li(s) with Al3 (aq) C) Li (aq) with Al(s) D) Li (aq) with Al3 (aq)
The question is incomplete, the complete question is:
Using the following portion of the activity series for oxidation half-reactions, determine which combination of reactants will result in a reaction.
[tex]Li(s)\rightarrow Li^+(aq)+e^-[/tex]
[tex]Al(s)\rightarrow Al^{3+}(aq)+3e^-[/tex]
A) Li(s) with Al(s)
B) Li(s) with [tex]Al^{3+}[/tex] (aq)
C) [tex]Li^+[/tex] (aq) with Al(s)
D) [tex]Li^+[/tex] (aq) with [tex]Al^{3+}[/tex] (aq)
Answer: The correct option is B): Li(s) with [tex]Al^{3+}[/tex] (aq)
Explanation:
The oxidation reaction is defined as the reaction in which a chemical species loses electrons in a chemical reaction.
A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction.
The chemical species will undergo a reduction reaction if the value of standard reduction potential is more positive or less negative.
For the given half-reactions:
[tex]Li(s)\rightarrow Li^+(aq)+e^-;E^o_{Li^+/Li}=-3.04V[/tex]
[tex]Al(s)\rightarrow Al^{3+}(aq)+3e^-;E^o_{Al^{3+}/Al}=-1.662V[/tex]
As the value of standard reduction potential of aluminium is less negative. Thus, it undergoes reduction reaction and lithium will undergo oxidation reaction.
The half-reaction follows:
Oxidation half-reaction: [tex]Li(s)\rightarrow Li^+(aq)+e^-[/tex] ( × 3)
Reduction half-reaction: [tex]Al^{3+}(aq)+3e^-\rightarrow Al(s)[/tex]
Overall cell-reaction: [tex]3Li(s)+Al^{3+}(aq)\rightarrow 3Li^+(aq)+Al(s)[/tex]
Hence, the correct option is B): Li(s) with [tex]Al^{3+}[/tex] (aq)
Liquid X is known to have a lower viscosity and lower surface tension than Liquid Y Use these facts to predict the result of each experiment in the table below, if you can. experiment predicted outcome O mx will be greater than my O mx will be less than my O Ill y will be equal to my Wax-coated particles carefully put onto the surface of Liquid X or Liquid Y will stay on the surface, if the particles are small enough. The heaviest mass of particle x and my that will stay on each liquid's surface without sinking are measured. It's impossible to predict whether mx or my will be greater without more information. OFx will be greater than F)y 15.0 mL of Liquid X are poured into a beaker, and 15.0 mL of Liquid Y are poured FX will be less than Fr into an identical beaker. Stirrers in each beaker are connected to motors, and thewill be equal to P forces Fx and Fy needed to stir each liquid It's impossible to predict whether Fr or F will at a constant rate are measured. be greater without more information.
To solve this, we must know each and every concept related to surface tension and viscosity as well. Therefore, mx will be less than my at liquid air interface.
What is surface tension?The tendency to reduce surface area produced by the tension of a liquid's surface film as a result of the surface layer's particles being drawn to the liquid's bulk is called surface tension.
Surface tension is caused by a net inward force that makes the surface operate like an elastic membrane on which objects may float freely. This net inward force is caused by a stronger cohesion between liquid molecules than adhesion between liquid and air molecules.
There is less surface tension in liquid x. As a result, it is unable to contain as many wax particles on its surface as liquid Y can. The liquids will combine uniformly. It is possible to combine two liquids with viscosities that are either lower or greater than the initial liquids.
Therefore, mx will be less than my at liquid air interface.
To know more about surface tension, here:
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explain what variable is?
PLEASE FAST
Answer:
an element, feature, or factor that is liable to vary or change.
Sample of 200mls of 0.5 sulphuric acid,was asked to produce 1.2M of the new solution.Calculate the volume of the new solution
Answer: The volume of the new solution is 83.33 mL.
Explanation:
Given: [tex]V_{1}[/tex] = 200 mL, [tex]M_{1}[/tex] = 0.5 M
[tex]V_{2}[/tex] = ?, [tex]M_{2}[/tex] = 1.2 M
Formula used to calculate the volume of new solution is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\0.5 M \times 200 mL = 1.2 M \times V_{2}\\V_{2} = 83.33 mL[/tex]
Thus, we can conclude that volume of the new solution is 83.33 mL.
formula for dicyanoargentate (I) ion
Answer:
Potassium dicyanoargentate(I) | C2AgKN2 - PubChem.
Synonyms: Potassium dicyanoargentate(I)pota...
Molecular Formula: C2AgKN2
Explanation:
Put the steps in order to show how crystals are formed.
Formation of ions:
Formation of crystals:
Formation of ionic bonds:
Formation of cubes:
This Should Be Your Answer:
Step 1: Formation of ions
Step 2: Formation of ionic bonds
Step 3: Formation of cubes
Step 4: Formation of crystals
I Hope This Helps? :)
Answer:
Black Cats?
Explanation:
A gas occupies a volume of 584 mL at a pressure of 770 mm of Hg. When the pressure is changed, the volume becomes 603 mL If the temperature stays constant, what is the new pressure in mm of Hg?
Please help!!
Answer:
[tex]P_2=795mmHg[/tex]
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to calculate the final pressure by using the Boyle's law as an inversely proportional relationship in pressure to volume at constant temperature:
[tex]\frac{P_2}{V_2} =\frac{P_1}{V_1}[/tex]
Thus, we solve for our target, P2, to obtain:
[tex]P_2=\frac{P_1V_2}{V_1} =\frac{770mmHg*603mL}{584mL}\\\\P_2=795mmHg[/tex]
Regards!
10. What could the pH of a solution be if a cyanidin indicator turned blue? What is used to determine the endpoint of a titration? (Choose all that apply)
D 4
5
06
07
Answer:
The cyanidin indicator turns blue within a pH range of 5 - 7. The pH of the solution could be 5, 6 or 7.
An indicator is used to determine the endpoint of a titration.
Explanation:
Cyanidin indicator changes colour with each change in pH. In acidic solutions (pH < 7) cyanidin indicator will turn red, through to purple and blue, while in basic solutions (pH > 7), cyanidin indicator will change colour from aquamarine through to green and yellow. The cyanidin indicator turns blue within a pH range of 5 - 7.
Titration is a technique used in analytical chemistry to determine the unknown concentration of a solution. A solution of known concentration is added from a burette to the solution of unknown concentration until the reaction between the two solutions is complete. This known as the endpoint of the experiment. The endpoint of a titration is determined using an indicator which is added to reaction mixture. A colour charge is produced by the indicator at the endpoint of the reaction.
Note: An indicator is a dye of weak organic acids or bases which changes colour with changes in the pH of a solution. Some common indicators are methyl orange, methyl red, phenolphthalein, etc. These indicators are used to monitor the changes in the pH of solutions during a reaction.
Answer:
5,7,6
Explanation:
Took the quiz! Good luck!
In the laboratory a student combines 47.8 mL of a 0.321 M aluminum nitrate solution with 21.8 mL of a 0.366 M aluminum iodide solution.
What is the final concentration of aluminum cation ?
M
Answer: The final concentration of aluminum cation is 0.335 M.
Explanation:
Given: [tex]V_{1}[/tex] = 47.8 mL (1 mL = 0.001 L) = 0.0478 L
[tex]M_{1}[/tex] = 0.321 M, [tex]V_{2}[/tex] = 21.8 mL = 0.0218 L, [tex]M_{2}[/tex] = 0.366 M
As concentration of a substance is the moles of solute divided by volume of solution.
Hence, concentration of aluminum cation is calculated as follows.
[tex][Al^{3+}] = \frac{M_{1}V_{1} + M_{2}V_{2}}{V_{1} + V_{2}}[/tex]
Substitute the values into above formula as follows.
[tex][Al^{3+}] = \frac{M_{1}V_{1} + M_{2}V_{2}}{V_{1} + V_{2}}\\= \frac{0.321 M \times 0.0478 L + 0.366 M \times 0.0218 L}{0.0478 L + 0.0218 L}\\= \frac{0.0153438 + 0.0079788}{0.0696}\\= 0.335 M[/tex]
Thus, we can conclude that the final concentration of aluminum cation is 0.335 M.
which is generally more soluble in water ammonium chloride or potassium chloride explain
Answer:
Ammonium chloride
Explanation:
because is a salt which is highly soluble in water than potassium
Which of these do not react with acids. nitrogen, magnesium, zinc,iron
Answer:
Nitrogen gas does not react with acids under normal conditions.
Explanation:
It is 100% correct
Nitrogen does not react with acids, because it is non-metal. Non-metals cannot displace hydrogen from acids.
What is the pH of a 0.086 M HCl solution?
Answer: pH = 1.066
Explanation: HCl is strong acid and it protolyzes totally:
HCl + H2O ⇒ H3O+ + Cl-
Concentrations are same: [H3O+] = c(HCl)
pH = - log[H3O+] = - log(0.086) = 1.0655
what is the name of this compund
Answer:
Ethyl ethanoate
Explanation:
To name the compound given above, we must:
1. Determine the functional group of the compound.
2. Determine the longest continuous carbon chain before the functional group and the longest continuous carbon chain after the functional.
3. Name the compound by naming the compound after the functional group followed by the compound before the functional group ending its name with
–oate.
Now, we shall determine the name of the compound as follow:
1. The compound is an ester with the functional group R'COOR.
Note: R' and R are alkyl groups which may be the same or different.
2. The longest continuous carbon chain before the functional group is 2 i.e ethane and the longest continuous carbon chain after the functional group is 2 i.e ethyl
3. The name of the compound after the functional group => ethyl.
The name of the compound before the functional group => ethane but the pressence of the two oxygen atoms makes it ethanoate.
Therefore, the name of the compound is Ethyl ethanoate
Write the balanced COMPLETE ionic equation for the reaction when aqueous BaCl₂ and aqueous (NH₄)₂SO₄ are mixed in solution to form aqueous NH₄Cl and solid BaSO₄. If no reaction occurs, simply write only NR.
Answer:
Ba²⁺(aq) + 2 Cl⁻(aq) + 2 NH₄⁺(aq) + SO₄²⁻(aq) ⇒ 2 NH₄⁺(aq) + 2 Cl⁻(aq) + BaSO₄(s)
Explanation:
Let's consider the molecular equation that occurs when aqueous BaCl₂ and aqueous (NH₄)₂SO₄ are mixed in solution to form aqueous NH₄Cl and solid BaSO₄. This is a double displacement reaction.
BaCl₂(aq) + (NH₄)₂SO₄(aq) ⇒ 2 NH₄Cl(aq) + BaSO₄(s)
The complete ionic equation includes all the ions and insoluble species.
Ba²⁺(aq) + 2 Cl⁻(aq) + 2 NH₄⁺(aq) + SO₄²⁻(aq) ⇒ 2 NH₄⁺(aq) + 2 Cl⁻(aq) + BaSO₄(s)
how many moles of al is needed to replace all the iron from 5.6 moles of fe2o3
1. What kind of gas is unique to the
planet Earth?
2. What kind of gas is common to all
living organisms?
3. Differentiate a high-density wind from a
low-density wind and explain how air
flows
4. Differentiate the local winds: Land and
sea breeze. Give at least 2
explanations.
What weight of barium chloride will react with 2.36g of sodium sulphate in solution so as to produce 3.88g of barium sulphate and 1.94g of sodium chloride in solution?
PLEASE give the answer faster
Answer:
3.46 g of BaCl2
Explanation:
The equation of the reaction is;
BaCl2(aq) + Na2SO4(aq) --------> 2NaCl(aq) + BaSO4(s)
Number of moles of barium sulphate produced = 3.88 g/233.38 g/mol = 0.0166 moles
From the reaction equation;
1 mole of BaCl2 yields 1 mole of barium sulphate
Hence 0.0166 moles of BaCl2 yields 0.0166 moles of barium sulphate
Hence;
Mass of BaCl2 required = 0.0166 moles × 208.23 g/mol = 3.46 g of BaCl2
How/why is maintaining healthy soil a social justice issue for our area and community
Answer:
Social justice aims to give individuals and groups fair treatment and an impartial share of social, environmental and economic benefits. The concept promotes the fair distribution of advantages and disadvantages within a society, regardless of background and status.
Environmental justice deals explicitly with the distribution of environmental benefits and the burdens people experience, at home, at work, or where they learn, play and spend leisure time. Environmental benefits include attractive and extensive greenspace, clean air and water, and investment in pollution abatement and landscape improvements. Environmental burdens include risks and hazards from industrial, transport-generated and municipal pollution.
what is the molarity of 0.40 mol of NaCI dissolved in 1.6 L of solution
Answer:.25 M
Explanation: .4mol/1.6L = .25 M
Answer:
8383idndjdjdje7i3jrbdu vying to get out the 3game in the
Explanation:
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State whether 0.1 M solutions of each of the following salts are acidic, basic, or neutral. Explain your reasoning for each by writing a balanced net ionic equation to describe the behavior of each nonneutral salt in water: NaCN, KNO3, NH4Cl, NaHCO3, and Na3PO4.
Answer:
1) NaCN is a basic salt
2) [tex]KNO_3[/tex] is a neutral salt
3) [tex]NH_4Cl[/tex] is an acidic salt
4) [tex]NaHCO_3[/tex] is a basic salt
5) [tex]Na_3PO_4[/tex] is a neutral salt
Explanation:
Salts are formed by the combination of an acid and a base. There are 3 types of salt:
Acidic salt: It is formed by the combination of strong acid and weak base.Basic salt: It is formed by the combination of a strong base and weak acid.Neutral salt: It is formed by the combination of strong acid and strong base or weak acid and weak base.For the given salts:
1) NaCN is a basic salt as it is formed by the combination of sodium hydroxide (strong base) and HCN (weak acid). The chemical equation for the hydrolysis of salt follows:
[tex]NaCN+H_2O\rightarrow NaOH+HCN[/tex]
As NaOH is released in the solution. Thus, it is a basic salt.
2) [tex]KNO_3[/tex] is a neutral salt as it is formed by the combination of potassium hydroxide (strong base) and nitric acid (strong acid).
3) [tex]NH_4Cl[/tex] is an acidic salt as it is formed by the combination of ammonium hydroxide (weak base) and HCl (strong acid). The chemical equation for the hydrolysis of salt follows:
[tex]NH_4Cl+H_2O\rightarrow NH_4OH+HCl[/tex]
As HCl is released in the solution. Thus, it is an acidic salt.
4) [tex]NaHCO_3[/tex] is a basic salt as it is formed by the combination of sodium hydroxide (strong base) and partial dissociation of carbonic acid (weak acid). The chemical equation for the hydrolysis of salt follows:
[tex]NaHCO_3+H_2O\rightarrow NaOH+H_2CO_3[/tex]
As NaOH is released in the solution. Thus, it is a basic salt.
5) [tex]Na_3PO_4[/tex] is a neutral salt as it is formed by the combination of sodium hydroxide (strong base) and phosphoric acid (strong acid).
3. 78 mL of 2.5 M phosphoric acid is neutralized with 500 mL of potassium hydroxide. What is the
concentration of the base?
by acid-base reaction explain why thymol is sparingly soluble in water but soluble in 1M NaOH solution
Answer:
Sulphanilic acid is insoluble in both water as well as in acid because it can not form hydrogen bonding with the water molecule. But it is soluble in aqueous mineral acid like HF,HCl,HNO3 because they are able to form a hydrogen bond with mineral acids. Was this answer helpful?
What is the IUPAC name of the following compound?
Select one:
a. 4-methyl-3-phenyl-3-pentenoic acid
b. (Z)-3-methyl-2-phenyl-2-butenoic acid
c. 3-phenyl-2-methyl-2-penten-5-oic acid
d. 4,4-dimethyl-3-phenyl-3-butenoic acid
The image of the structure is attached in the image below.
Answer: The correct option is a.) 4-methyl-3-phenyl-3-pentenoic acid
Explanation:
Carboxylic acids are a type of functional group in organic chemistry that have the symbol '-COOH'. A suffix used for this functional group is '-oic acid'.
To name a compound, first look for the longest possible carbon chain.
As in the image attached below, the longest carbon chain has 5 carbon atoms. Thus, the prefix used will be 'pent-'
Also, a methyl substituent is present at the 4th position, a phenyl substituent is located at the 3rd position.
A double bond is also present at the 3rd position and a suffix '-ene' is used.
Hence, the IUPAC name for the given compound is 4-methyl-3-phenyl-3-pentenoic acid.
Which statement about the relationship between laws, hypothesis, and theories is true?
The question is incomplete, the complete question is;
Which statement about the relationship between laws, hypotheses, and theories is true?
A.
Laws that remain true over an extended period of time are considered theories.
B.
A theory that holds true for a long time is considered a law.
C.
If a law is not contradicted after a lot of testing, it may be considered a hypothesis.
D.
If a hypothesis is not contradicted after a lot of testing, it may be considered a law.
Answer:
If a hypothesis is not contradicted after a lot of testing, it may be considered a law.
Explanation:
A hypothesis is an intelligent guess which is put forward to explain a particular scientific observation. Hypothesis are temporary explanations that must be subjected to rigorous scientific investigation.
If a hypothesis holds true for some time it is regarded as a theory. The theory is also subjected to further rigorous scientific experiments to see if it can be regarded as a law.
If the statement of the hypothesis is not contradicted after a lot of testing, it may be considered a law.
Suppose a current of 0.860A flows through a copper wire for 5.0 minutes. Calculate how many moles of electrons travel through the wire. Be sure your answer has the correct unit symbol and round your answer to 2 significant digits.
Answer:
2.7×10⁻³ mole
Explanation:
Applying
Q = it.............. Equation 1
Where Q = amount of charge, i = current, t = time
From the question,
Given: i = 0.860 A, t = 5 minutes = (5×60) seconds = 300 seconds
Subsitute these values into equation 1
Q = (0.860×300)
Q = 258 C
If one mole of electron has a charge of 96500 C
Then, x mole of electron will have a charge of 258 C
1 mole ⇒ 96500 C
X moles ⇒ 258 C
Solve for X
X = (258×1)/96500
X = 2.7×10⁻³ mole
Stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. Based on your data, is the newly discovered star a younger star? Explain your answer.
Answer:
Newly discovered star is a younger star
Explanation:
The composition of the newly discovered star is Hydrogen, Lithium, Neon, Sodium, Mercury
It consists of both hydrogen and helium of which the old stars are not made up of as they are heavier than the new stars.
Considering the above fact, it can be stated that the new star is a young star.
Answer:
A newly discovered star is a younger star because the composition of the newly discovered star is Hydrogen, Lithium, Neon, Sodium, and Mercury. And also further consists of both hydrogen and helium of which the old stars are not made up of, as they are heavier than the newer stars. And by considering that fact; it can be stated that the new star is a young star.
Explanation:
I did the lab