Adding water to an acid or base will change its pH. ... The acid is becoming less acidic. Similarly, when an alkali is diluted with water the concentration of OH - ions decreases. This causes the pH of the alkali to fall towards 7, making the solution less alkaline as more water is added
Alkali is a chemical that is characterized by reacting with acids to produce salts. When alkali or base are added to the distilled water then pH increases.
What is pH?
The pH has been defined as the concentration of the hyronium or the hydrogen ions that releases when dissolved in water. The concentration of the hydroxide and the hydrogen are the determining factor of the acidic and basic nature.
The acids are characterized by the low pH (below 7) whereas, the basic compounds are characterized by the high pH (above 7). The pH scale is used to measure the pH of the solution.
When an alkali is added to the distilld water then hydroxide ions are relesed resulting in an increase in the basicity of the water sample. The pH range depends on the strong and weak base.
Therefore, the pH increases after ading alkaline solution.
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A student places 2 mL of 2% ethanolic silver nitrate solution into test tube. They add 2 drops of an unknown compound into the test tube while gently mixing. After five minutes, the student heated the test tube in a water bath and a white precipitate formed. They added 2 drops of 1 M nitric acid to the mixture which was cooled to room temperature and still noticed the precipitate did not dissolve in response to the nitric acid. What compound is most likely the unknown
Answer:
hi
Explanation:
i am smart but i need this app cuz some are realy hard
How many moles is equal 82.4 grams of CO,?
Answer:
1 mole = 28.0101
Hence,
82.4 = around 2.8 mole
Have a great day <3
Use the following balanced reaction to solve 1-3:
P4 (s) + 6H2 (g) → 4PH3 (g)
How many grams of phosphorus trihydride will be formed by reacting 60 L of Hydrogen gas with an excess of P4?
Answer:
60.86 g of PH₃
Explanation:
We'll begin by calculating the number of mole of H₂ that will occupy 60 L. This can be obtained as follow:
22.4 L = 1 mole of H₂
Therefore,
60 L = 60 / 22.4
60 L = 2.68 mole of H₂.
Next, we shall determine the number of mole of PH₃ produced by the reaction of 60 L (i.e 2.68 mole) of H₂. This can be obtained as follow:
P₄ + 6H₂ –> 4PH₃
From the balanced equation above,
6 moles of H₂ reacted to produce 4 moles of PH₃.
Therefore, 2.68 moles of H₂ will react to to produce = (2.68 × 4)/6 = 1.79 moles of PH₃.
Finally, we shall determine the mass of 1.79 moles of PH₃. This can be obtained as follow:
Mole of PH₃ = 1.79 moles
Molar mass of PH₃ = 31 + (3×1)
= 31 + 3 = 34 g/mol
Mass of PH₃ =?
Mass = mole × molar mass
Mass of PH₃ = 1.79 × 34
Mass of PH₃ = 60.86 g
Thus, 60.86 g of PH₃ were obtained from the reaction.
PLEASE HELP!!
A scientist places a pH meter in a sample of concentrated potassium hydroxide (KOH). The scientist slowly adds nitric acid (HNO3) to the KOH and monitors the pH. Describe how the pH and hydronium ion concentration will change in the solution as the acid is added.
Answer:
pH of the solution will decrease & hydronium ion concentration will increase in the solution as the acid is added.
Explanation:
This timeline woulchre useful to someone who was writing a report titled
Mass of watch glass + filter paper = 105.98 g
Mass of watch glass + filter paper + crystallized product = 109.03 g
Mass of uncrystallized product (show work) =
Mass of methyl benzoate = 3.08 g
Volume of nitric acid used = 2.0 mL
Theoretical yield based on each of the starting materials
(Please use two Dimensional Analysis (DA) equations, one for the maximum amount of product obtainable from the amount of methyl benzoate you used and the other from the concentrated nitric acid, then use the lesser of the two to determine the Limiting Reagent; you must determine the number of moles in 2.00 mL of concentrated nitric acid [concentration 69.0% (w/w), and density (1.42 g/mL)].
Required:
a. Identity of the Limiting reagent (LR) based on the above two DA equations = __________
b. Max amount of product obtainable from the LR = ___________
c. Mass of the product you obtained: ____________
Answer:
Explanation:
Mass of uncrystallized product = (Mass of watch glass + filter paper + crystallized product) - (Mass of watch glass + filter paper)
Mass of uncreystaliized product = 109.03 gm - 105.98 gm
Mass of uncrystaliized product = 3.05 gm
For methyl benzoate;
mass = 3.08 g
no of moles = 3.08 g/ 136.15 g/mol = 0.0226 mole
It is possible for the formation of 1 mole of nitro methyl benzoate from a mole of methyl benzoate.
moles of nitro methyl benzoate that can be formed from 0.0226 moles of methyl benzoate = 0.0226 moles
∴
mass of nitro methyl benzoate = 0.0226 mol × 181.15 gm /mol
mass of nitro methyl benzoate = 4.098 gm
For HNO_3 solution:
mass = 1.42 gm/ml × 2.0 ml
mass = 2.84 gm
Mass of HNO3 in 2.84 gm solution[tex](69\% w/w)= 2.84 gm * \dfrac{69}{100 }[/tex]
= 1.9596 gm
Moles of HNO3 = [tex]\dfrac{ 1.9596 \ gm }{ 63.01 gm /mol}[/tex]
= 0.0311 mole
1 mol of HNO_3 can be formed from 1 mole of nitro methyl benzoate
Thus; moles of nitro methyl benzoate that can be formed from 0.0311 mole of HNO_3 = 0.02256 mole
The mass for nitro methyl benzoate can now be determined as:
= 0.0311 mole × 181.5 gm/mole
= 5.634 gm
Since the mass formed from methyl benzoate is lesser, then methyl benzoate serves as the limiting reagent.
The mass obtainable from the LR = 4.098 gm
Help this is for marks, who ever answers get brainliest
Answer:
Coal
Explanation:
thx for points :D
Answer:
Coal
Explanation:
your welcome<3
explain what you would do expect caesium astatide to look like .will it be soluble in water ?explain your reasoning
Answer:
it will not be soluble in water Becoz it can only be
separated by passing it through silver nitrate solution
Explanation:
i hope you understand
Help bestie pls help ASAP thank you
Explanation:
heyyyyyyyyy how are you sure
What is the function of white blood cells?
A) immunity
b) carry nutrients, waste
C) blood clotting
Answer:
A
Explanation:
They help fight infection and other disease
Answer:
immunity is the answer for this question
In a neutralization reaction, bases donate.
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Answer: I think it is hydroxide ion but im not sure
Explanation:
I hope this helped!
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Classify the following as either an element, compound, homogeneous mixture or
heterogeneous mixture:
milk
Answer:
HeterogeneousExplanation:
Milk seems to be homogeneous mixture but actually milk is a heterogeneous mixture and a colloid solution.PCR amplification utilizes ________ template to produce a ________ product. For this question, select the answer that best describes the process as a whole: the nature of the template you used (the starting template added to the reaction) and the nature of the final product produced in your PCR analysis that you ran out on a gel will apply here.
Answer:
Double-stranded/Double-stranded
Explanation:
The PCR which is popularly known as polymerase chain reaction is the technique that uses the single copy of DNA to make thousands or levels a huge number(in terms of millions) of duplicates of that DNA.
The PCR is a laboratory procedure that is utilized to make various duplicates of a section of DNA as depicted previously. It is an unmistakable strategy.
There are 3 fundamental advances in PCR:
Denaturing
Annealing
Extending
In denaturing measure requires warming of the double-stranded DNA template to isolate it into a solitary strand. Eventually, it resulted into a double-stranded item.
A change resulting in one or more new substances being formed is a?
A. nuclear reaction
B.physical property
C. chemical change
D.physical change
Answer:
C. Chemical change
Explanation:
A physical change is where something is changed but it doesnt affect the build up of the chemical. For example, if you broke sticks and threw them on the ground, that would be a physical change because the change is happening to the physical being of the object and not its chemical buildup. However, if you lit those sticks on fire, that would be considered a chemical change because you end up with two substances, ash and the remnants of the stick. A nuclear reaction would result in something blowing up so its not that. And a physical property is like what it looks like or how it smells. Hope I helped you!
Express
as
ordinary numbers.
3 x 10^0=
What is the other product for this reaction? Hbr + NaOH —> ( select 2)
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Answer: HBr + NaOH = nabr + h2o
Explanation:
I hope this helped!
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The correct value of m, n, x and y to obtain a balanced equation is?
m B2O3(s) + n HF(l) → x BF3(g) + y H2O(l)
a.
m=1, n=1, x=1 and y=1
b.
m=1, n=6, x=2 and y=3
c.
m=1, n=1.5, x=1 and y=1
d.
m=2, n=12, x=4 and y=6
Answer:
d
Explanation:
answer d makes the equation balance
1/5 divided by 3/4 fraction
Answer:
4/15
Explanation:
we can write out an equation by doing (1/5 ÷ 3/4) and then switch the sign to multiplication and we can keep the first fraction the same (in this case 1/5) and then we flip the second fraction BUT when we flip the second fraction upside-down we have to change the symbol to multiplication (1/5x4/3)
then after that all we do is multiply the denominators and numerators :)
1 x 4 = 4
_______
5 x 3 = 15
answer would be 4/15
help with my science about the human body
Answer:
am sorry what exactly is your question?
PLEASE HELP:
iron reacts with nitrogen to form iron(III) nitride
Answer:
[tex]2Fe +N_{2} -> 2FeN[/tex]
Explanation:
Iron is Fe, nitrogen is N. Nitrogen is diatomic, which means it occurs as a molecular pair by itself. Iron III nitride has a chemical formula of FeN because nitrogen has a charge of 3-, and iron III tells us the iron has a charge of 3+ so you just need one of each to make the charges balance and the compound neutral.
When iron reacts with nitrogen to form iron(III) nitride, the balanced chemical equation of this reaction is as follows:
2 Fe + N₂ → 2FeN
What is balanced chemical equation ?The term balanced chemical equation is defined as a chemical equation in which mass is conserved and there are equal numbers of atoms of each element on both sides of the equation.
The chemical equation must be balanced in order to obey the law of conservation of mass. When the number of different atoms of elements in the reactants side equals the number of atoms in the products side, the chemical equation is balanced.
Nitrogen is diatomic, that means it occurs as a molecular pair by itself. Iron III nitride has a chemical formula of FeN because nitrogen has a charge of 3-, and iron III tells us the iron has a charge of 3+ .
Thus, iron reacts with nitrogen to form iron(III) nitride.
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Suppose you are titrating vinegar, which is an acetic acid solution of unknown strength, with a sodium hydroxide solution according to the equation H C 2 H 3 O 2 + N a O H ⟶ H 2 O + N a C 2 H 3 O 2 HCX2HX3OX2+NaOH⟶HX2O+NaCX2HX3OX2 If you require 33.98 mL of 0.1656 M N a O H NaOH solution to titrate 10.0 mL of H C 2 H 3 O 2 HCX2HX3OX2 solution, what is the molar concentration of acetic acid in the vinegar? Type answer:
Answer:
[tex]M_{acid}=0.563M[/tex]
Explanation:
Hello there!
In this case, given the neutralization of the acetic acid as a weak one with sodium hydroxide as a strong base, we can see how the moles of the both of them are the same at the equivalence point; thus, it is possible to write:
[tex]M_{acid}V_{acid}=M_{base}V_{base}[/tex]
Thus, we solve for the molarity of the acid to obtain:
[tex]M_{acid}=\frac{M_{base}V_{base}}{V_{acid}} \\\\ M_{acid}=\frac{33.98mL*0.1656M}{10.0mL}\\\\ M_{acid}=0.563M[/tex]
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Why does an asteroid get hotter when it goes close to the sun?
Chromium is manufactured by heating a mixture of chromium(III) oxide with aluminium powder.
Cr2O3(s) + 2Al(s) → 2Cr(s) + Al2O3(s)
a=Calculate the mass of aluminium needed to react with 50 g of Cr2O3.
b=Calculate the mass of chromium produced from 50 g of Cr2O3.
c=Calculate the mass of chromium produced from 5 kg of Cr2O3.
d=Calculate the mass of chromium produced from5 tonnes of Cr2O3.
Note: 1 tonne = 1,000,000 g
Ar: Cr = 52, O = 16, Al = 27
1,3,5,7-Cyclooctatetraene, C8H8, is an unusual hydrocarbon in that it reacts with exactly 2 equivalents of potassium to give A, C8H8K2, which can be isolated as a white solid. A exhibits a single proton NMR signal. Draw the structure of A
Answer:
Explanation:
The main assignment here is to provide the structure of A. But before that, let us explain briefly some certain things:
The proton NMR (1H) gives data about the quantity of non-identical protons present in the structure. The resonance frequency is seen regarding the standard compound (0 ppm), which is addressed as a chemical shift. The same protons have equal value of chemical shift.
The protons that are available in a similar environment are addressed as comparable protons and the protons with various conditions are called non-identical protons.
However, from the image below, we can see the reaction of the compound 1,3,5,7-cyclooctatetraene resulting in 2 equivalents of potassium forming an aromatic dianion.
A compound accepts electrons from another substance to form a covalent bond. Which term best describes this
compound's behavior?
-Lewis acid
-Arrhenius base
-Bronsted-Lowry acid
-Bronsted-Lowry base
Answer:
A). Lewis Acid
Explanation:
deez
The term that best describes the compound that accepts electrons from another substance to form a covalent bond is Lewis acid.
What is Lewis acid?Lewis acid is a compound or ionic species which can accept an electron pair from a donor compound while a Lewis base is a compound such as the OH- ion, that can donate a pair of non-bonding electrons.
According to this question, a compound accepts electrons from another substance to form a covalent bond.
Therefore, the term that best describes the compound that accepts electrons from another substance to form a covalent bond is Lewis acid.
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Which if the following numbers in your personal life are exact numbers?
A. Your cell phone number
B. Your weight
C. Your IQ
D. Your driver's license number
E. The distance you walked yesterday
Answer:
I think D
Explanation:
Your cell phone number and your driver's license number are the numbers of your personal life that are exact.
In this context, an exact number refers to a number that if it undergoes any modification will not refer to the same thing that it referred to before that modification.
For example, my phone number is 12345. This number is exact because it cannot be changed because or else it would cease to be my phone number, that is, if someone wants to call me and writes the number 12346 it is no longer my number.
Addicionally, if my driver's license number is 112233 it is an exact number because if it is modified it would be the number of another driver.
According to the above, options B, C, and E are incorrect because they are inaccurate numbers because if they are modified they all refer to me and they would not change their meaning.
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Radiation from which type of decay has the most energy?
A. Alpha decay
B. Electromagnetic decay
C. Beta decay
D. Gamma decay
Pls answer quick
Answer: D
Explanation:
Radiation from gamma decay has the most energy and the correct option is option D.
What is Radioactive Decay?To become more stable, the nuclei undergo radioactive decay. In this process, the nuclei give off energy and may also emit charged particles of matter.
Types of radioactive decay include alpha, beta, and gamma decay. In alpha and beta decay, both particles and energy are emitted. In gamma decay, only energy, in the form of gamma rays, is emitted.
In the gamma decay, a nucleus changes from a higher energy state to a lower energy state through the emission of electromagnetic radiation.
Therefore, Radiation from gamma decay has the most energy and the correct option is option D.
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In the reaction 2 H, Ł02 → 2 H, O, what is the mole ratio of hydrogen to water?
A 2:2
B 2:1
C 1:2
D 4:4
A
because both have 2's in front of them
The fizz in the soda that we drink is carbonic acid. Leaving the soda can open to the environment separates the carbonic acid into water and carbon dioxide. What type of reaction is this and what is the resulting product?
Answer:
The reactionnis known as a decomposition reaction
The equation of the reaction is given below as:
H₂CO₃ -----> H₂O + CO₂
Explanation:
A reaction in which a single compound is split into two or more simpler substances is known as a decomposition reaction.
In the reaction in which when a soda can is opened and left to the environment, the fizz in the soda, carbonic acid, separates into water and carbon dioxide is an example of a decomposition reaction.
The equation of the reaction is given below:
H₂CO₃ -----> H₂O + CO₂
In the reaction above, a larger molecular weight compound, carbonic acid with the molecular, H₂CO₃ is splits into two simpler substances of smaller molecular weight, water, H₂O and carbon dioxide, CO₂.
This reaction rate is made faster by an increase in temperature and by a decrease in pressure of the soda.
What is 2AI(s) + FeO3(s) = Ai2O3(s) + 2Fe(s)
Answer:
it's a double displacement Reaction.