8.4 × 10²³ atoms H₃PO₄
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
MolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.4 moles H₃PO₄
[Solve] atoms H₃PO₄
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.4 \ mol \ H_3PO_4(\frac{6.022 \cdot 10^{23} \ atoms \ H_3PO_4}{1 \ mol \ H_3PO_4})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 8.4308 \cdot 10^{23} \ atoms \ H_3PO_4[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
8.4308 × 10²³ atoms H₃PO₄ ≈ 8.4 × 10²³ atoms H₃PO₄
The kinetic energy of a gas particle can be transferred to another gas particle or to the wall of the container in a collision.
True or False
Answer:
True
Explanation:
Calculate the mass, in grams, of 992 atoms of cesium, Cs (1 mol of
Cs has a mass of 132.91 g).
Answer:
[tex]2.19x10^{-19}gCs[/tex]
Explanation:
Hello there!
In this case, it is possible to know that the amount of atoms of cesium are related to moles by means of the Avogadro's number, for that reason we first compute the moles in 992 atoms of this element:
[tex]992atomsCs*\frac{1molCs}{6.022x10^{23}atomsCs}=1.65x10^{-21}molCs[/tex]
Next, given its molar mass, we can compute the mass:
[tex]1.65x10^{-21}molCs*\frac{132.91gCs}{1molCs}\\\\2.19x10^{-19}gCs[/tex]
Best regards!
According to the selection, what is the main weakness of the tortoise?
Answer:
Nose
Explanation:
Because every time I touch it's nose, it will hide itself into the shell faster than other places
Hi!the main weakness of the tortoise is it's shell.The most shell of tortoise are so hard that most animals can't even make a scratch on it But flip one over and getting up will be a huge problem. They can suffer from dehydration or get picked off by predators. And even though reptiles are sun loving, they still can't regulate their body temperature and this could lead to over heating and death.
Q1what is adaptation?
Answer:
the action or process of adapting or being adapted.
Answer: Adaptation is the physical or behavioral characteristic of an organism that helps an organism to survive better in the surrounding environment. Living things are adapted to the habitat they live in. This is because they have special features that help them to survive.
Explanation: Hope this helped :)
Observe this chemical reaction:
4 Fe + 302- 2Fe 203
How many atoms of oxygen are in this !
Answer:
There are 6 atoms of oxygen
Explanation:
The total oxygen used here is represented as molecule. One molecule of oxygen as two atoms.
In this chemical equation, total three oxygen molecule reacts with the iron.
Hence, total number of atoms in 3 molecules of oxygen with two oxygen per molecule = [tex]3 * 2 = 6[/tex]
There are 6 atoms of oxygen
A sample of nitrogen gas has a temperature of 22.7oC when the volume of the container is 12.2L and it is under 150.4kPa of pressure. What temperature, in Kelvin, would the gas need to be in order to occupy a 9.7L container at 101.3kPa? Show all your work and round your answer to the hundredths place.
Answer:
158.35 K
Explanation:
Using the general gas law
P₁V₁/T₁ = P₂V₂/T₂ where P₁ = 150.4 kPa, V₁ = 12.2 L, T₁ = 22.7 °C = 273 + 22.7 = 295.7 K, P₂ = 101.3 kPa, V₂ = 9.7 L and T₂ = unknown.
Making T₂ subject of the formula, we have
T₂ = P₂V₂T₁/P₁V₁
Substituting the values of the variables into the equation, we have
T₂ = P₂V₂T₁/P₁V₁
T₂ = 101.3 kPa × 9.7 L × 295.7 K/150.4 kPa × 12.2 L
T₂ = 290,557.777 K/1,834.88
T₂ = 158.35 K
If 8.82 grams of Aluminum reacts, how many grams of AlCl3 will be produced?
Hey there! :
Molar mass:
Al = 26.9815 g/mol
AlCl₃ = 133.3405 g/mol
Reaction stochemistry ,calculates the mass of AlCl3 produced
2 Al + 3 Cl₂ = 2 AlCl₃
2 * 26.9815 g Al --------------------- 2 * 133.3405 g AlCl₃
8.82 g Al ------------------------------- ( mass of AlC₃ )
mass of AlCl₃ = ( 8.82 * 2 * 133.3405 ) / ( 2 * 26.9815 )
mass of AlCl₃ = 2352.12642 / 53.963
mass of AlCl₃ = 43.58 g of AlCl₃
Hope this helps!
2. The boat sailing on the sea slows down. What kind of friction is acting on it?
a.static friction
b. fluid friction
c. rolling friction
d.sliding friction
help me pls
Answer:
Dry friction. Dry friction resists relative lateral motion of two solid surfaces in contact. The two regimes of dry friction are 'static friction' ("stiction") between non-moving surfaces, and kinetic friction (sometimes called sliding friction or dynamic friction) between moving surfaces.
3. Which of the following statements best describes friction?
a. It is a force that occurs between solids.
b. It is a force that occurs only on rough surfaces.
c. It is a force that occurs between solids and liquids.
d. It is a force that occurs when surfaces touch each other.
pls help
Answer:
d.
Explanation:
It is a force that occurs when surfaces touch each other.
What type of chemical reaction is this?
Al(OH)3 → Al2O3 + H20
Answer:
The given equation [tex]Al(OH)_3[/tex] →[tex]Al_2O_3+H_2O[/tex] is the type of decomposition reaction.
Explanation:
DECOMPOSITION REACTION-: A decomposition reaction occurs when a single compound decomposes into two or more elements or new compounds. These reactions take place when energy is supplied in the form of heat, electricity, or light, which allows the material to break down into simpler substances.
The most common form of decomposition reaction is -
[tex]AB[/tex] → [tex]A+B[/tex]
TYPES OF DECOMPOSITION REACTION IS -
THERMAL DECOMPOSITION REACTION -: Thermolysis, or thermal decomposition, is a chemical decomposition caused by heat. The temperature at which a material chemically decomposes is known as its decomposition temperature. Heat is needed to sever chemical bonds in the compound being decomposed, so the reaction is normally endothermic.Example- As calcium carbonate (limestone or chalk) is heated, it breaks down into calcium oxide and carbon dioxide. The following is the chemical reaction:
[tex]CaCO_3[/tex] →[tex]CaO+CO_2[/tex]
ELECTROLYTIC DECOMPOSITION REACTION -: An electrolytic reaction is a chemical reaction in which electricity is passed through the aqueous solution of the reactant, resulting in the breakdown of the reactant into the substance.Example -: When electricity is passed through an aqueous solution of sodium chlorine (NaCl), sodium and chlorine are created.
NaCl → Na + Cl
PHOTOLYTIC DECOMPOSITION REACTION -: Light or photons are used to break down the reactants into many components in this form of reaction. The photo decomposition reaction is the decomposition reaction that occurs as a result of the action of light. Photolysis is another name for these reactions. In these reactions, light absorption excites electrons, which causes bonds to break and products to form.Example - As silver chloride is exposed to light, it decomposes into silver metal and chlorine.
[tex]2AgCl[/tex] →[tex]2Ag+Cl_2[/tex]
Balance
CO2 (g) + H2O (l) → 2H2CO3 (aq)
PLS ANSWER FAST WILL RATE BRAINLIEST
Answer:
coa;
Explanation:
n
Answer:
2CO2 (g) + 2H2O (l) → 2H2CO3 (aq)
Explanation:
“The study of what substances are involved within the reaction” is the definition for which term?
I always was bad at science
Balancing the following chemical equation, and determine its reaction type.
LiCl +
[Br₂ -
LiBr +
_CI2
Answer:
[tex]2LiCl +Br_2 \rightarrow 2LiBr +Cl_2[/tex]
Single displacement reaction.
Explanation:
Hello!
In this case, by firstly rearranging the chemical reaction as shown below:
[tex]LiCl +Br_2 \rightarrow LiBr +Cl_2[/tex]
It is also necessary to balance it at follows:
[tex]2LiCl +Br_2 \rightarrow 2LiBr +Cl_2[/tex]
Thus, since bromine and chlorine are being exchanged as a result of the atoms rearrangement, we infer this is a single displacement reaction.
Best regards!
What is happening to the particles in a substance during evaporation?
O The particles are losing energy and slowing down.
O The particles are giving off light.
O The particles are gaining energy and speeding up.
O The particles are getting closer together.
Answer:
C
Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.
The octet rule states that atoms tend to gain, lose, or share electrons in order to acquire a full
set of valence electrons. Which type of model could be used to demonstrate this process?
Explanation:
The octet rule states that atoms tend to form compounds in ways that give them eight valence electrons and thus the electron configuration of a noble gas. ... Atoms of nonmetals tend to gain electrons in order to fill their outermost principal energy level with an octet.
Which of the following categories best describes a chocolate chip cookie?
a.
Mixture and homogeneous
b.
Pure substance and element
c.
Mixture and heterogeneous
d.
Pure substance and compound.
Answer:
I would say c
Explanation:
A chocalate chip cookie is a combination of both the dough and the chocalate chips seperately physically combined so it cannot be a pure substances (as pure substances are one type of substance only, such as just Methane). It is also homogeneous because to be homogeneous, you have to be uniform throughout and a chocalate chip cookie has an uneven placing of chocalate chip cookies.
The category in which a chocolate chip cookie can be included is a heterogenous mixture. Because it contains different component which are in different phases.
What are mixtures?Mixtures are combination of two or more individual components. They can be mixed by physically or can be reacted together chemically. The components of a mixture can be separated using techniques based on their physical properties.
The mixtures in which all components are mixed uniformly and form a single phase is called a homogenous mixture. Mixtures with different phases and random distribution of components are called heterogenous mixtures.
A chocolate chip cookie is contains solid substances which are non-uniformly mixed together like chocolate chips in between solid cookie. Hence, it is heterogenous mixture. Thus, option c is correct.
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I NEED HELP ASAP PLEASE GIVING BRAINLIEST!
Answer: Frequency
Explanation: Without a doubt my answer is Frequency, none of the other options have nothing to do with sound waves so Frequency is my best bet.
Student Exploration: Moles
???
thermal energy lab report
Investigating the Molecular Scale
Answer:
nice
Explanation:
how is it
How many oxygen atoms are there in 979 g Ba3(AsO4)2?
Answer:
2
Explanation:
75.0 g of ammonium sulfate
PLEASE HELP :(
What most likely accounts for the difference between curve A and curve B on
the energy diagram?
A. The reaction described by curve B is under greater pressure.
B. The reaction described by curve B is at a different temperature.
C. The reaction described by curve B has higher reactant
concentrations.
D. The reaction described by curve B is occurring with a catalyst.
Answer:
D. The reaction described by curve B is occurring with a catalyst.
Explanation:
The peak in the curve is the activation energy. According to this graph, the activation energy was lowered. A catalyst is what you can use to lower the activation energy.
The most likely accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst, therefore option (d) is correct.
What do you mean by the catalyst in a reaction ?A catalyst is a chemical substance which alters the rate of a reaction without itself undergoing any permanent chemical change.
A catalyst does not initiate a chemical reaction. A catalyst does not be consumed in the reaction.
Catalysts tend to react with reactants to form intermediates and at the same time facilitate the production of the final reaction product. After the whole process, a catalyst can regenerate.
Catalysts encourage molecules to react and make the whole reaction process easier and efficient.
The most likely accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst, ,hence option (d) is correct.
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properties of lithium are anomalous. justify this statement
Answer:
Lithium shows anomalous behavior due to its small size. The polarizing power of lithium ion is highest of all the alkali metal ion . Because of small size, Lithium is very hard, less reactive as compare to other alkali metals like sodium and potassium.
Hope this helps:)
How many atoms are in 7.2 MOL of Chlorine?
Answer:
7.2 mol * (6.02*10^23)= 4.3*10^24 atoms
Explanation:
The number of atoms in one mole of chlorine contains 6.022 × 10²³ . Therefore the number of Cl atoms in 7.2 moles is 4.3 × 10²⁴.
What is Avogadro number ?One mole of every substance contains 6.022 × 10²³ atoms. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.
Chlorine is 17th element in periodic table. Cl is a non-metal with high electronegativity. The atomic mass of Cl is 35.5 g. Thus, 35.5 g contains Avogadro number of Cl atoms.
One mole of Cl contains 6.022 × 10²³ atoms. Tus, number of atoms in 7.2 mol is Avogadro number times the number of moles.
no.of atoms = 6.022 × 10²³ × 7.2 = 4.3 × 10²⁴ atoms.
Therefore, 7.2 moles of Cl contains 4.3 × 10²⁴ atoms.
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5.
In the food web below, what is one example of an omnivore? fox
cricket
squirrel
mouse
a. on the right with the long wavelengths
b. in the middle
c. on the left with the short wavelengths
d. we can see the whole thing
:)
Answer:
b. in the middle
Explanation:
your answer choice is correct!
What is distillation
Answer:
Definition:
1. The action of purifying a liquid by a process of heating and cooling.
2. The extraction of the essential meaning or most important aspects of something.
Explanation:
Answer:
the action of purifying a liquid by a process of heating and a process of cooling.
Explanation:
look at the answer.
Chlorobenzene (C H Cl), an important solvent and intermediate in the production of many other chemicals, is produced by bubbling chlorine gas through liquid benzene in the presence of ferric chloride catalyst. In an undesired side reaction, the product is further chlorinated to dichlorobenzene, and in a third reaction the dichlorobenzene is chlorinated to trichlorobenzene. The feed to a chlorination reactor consists of essentially pure benzene and a technical grade of chlorine gas (98 wt% Cl , the balance gaseous impurities with an average molecular weight of 25.0). The liquid output from the reactor contains 65.0 wt% C H , 32.0 wt% C H Cl, 2.5 wt% C H Cl , and 0.5 wt% C H Cl . The gaseous output contains only HCl and the impurities that entered with the chlorine.
You wish to determine:
a. the percentage by which benzene is fed in excess
b. the fractional conversion of benzene
c. the fractional yield of monochlorobenzene
d. the mass ratio
Answer:
a) % of excess = 236 %
b) Conversion of benzene = 0.27
c) Yield = 83.8%
d) ratio = 0.265
Explanation:
Step 1: Data given
The liquid output from the reactor contains:
65.0 wt% C6H6
32.0 wt% C6H5Cl
2.5 wt% C6H4Cl2
0.5 wt% C6H3Cl3
Molar mass of C6H6 = 78.11 g/mol
Molar mass of C6H5Cl = 112.56 g/mol
Molar mass of C6H4Cl2 = 147.01 g/mol
Molar massof C6HCl3 = 181.45 g/mol
Step 2: The equations
General form: A + B → C +D
C6H6 + Cl2 → C6H5Cl + HCl
C6H5Cl + Cl2 → C6H4Cl2 + HCl
C6H4Cl2 + HCl → C6H3Cl3 + HCl
Step 3: Calculate number of moles
Lets suppose the total mass in the reactor is 100 grams
Number of moles =mass / molar mass
Number of moles C6H6 = 65.0 grams / 78.11 g/mol
Number of moles C6H6 = 0.832 moles C6H6
Number of moles C6H5Cl = 32.0 grams / 112.56 g/mol
Number of moles C6H5Cl = 0.284 moles C6H5Cl
Number of moles C6H4Cl2 = 2.5 grams / 147.01 g/mol
Number of moles C6H4Cl2 = 0.017 moles C6H4Cl2
Number of moles C6H3Cl3 = 0.50 grams / 181.45 g/mol
Number of moles C6H3Cl3 = 0.0028 moles C6H3Cl3
Total number of moles = moles C6H6 + moles C6H5Cl + moles C6H4Cl2 + moles C6H3Cl3
Total number of moles = 0.832 + 0.284 + 0.017 + 0.0028
Total number of moles = 1.14 moles
Liquid part: C6H6 + Cl2 → C6H5Cl + HCl
n1 → n3 + n4 ( HCl)
Gas part: n2 (Cl2) + n3 → nTotal (1.14 moles)
Moles of carbon = 6*n1 = 1.14 moles of A
moles of Hydrogen = 6*n1 = 6* moles of C6H6 + 5*moles of C6H5Cl + 4* moles of C6H4Cl2 + 3* moles of C6H3Cl3 + moles of HCl ( = n4)
moles of Hydrogen =6*n1 = 6*0.832 + 5*0.284 + 4*0.017 + 3*0.0028 + n4
n4 = 0.352 moles of D (HCl)
Moles of Chlorine: 2*n2 = 1* moles of HCl + 1* moles of C6H5Cl + 2* moles of C6H4Cl2 + 3* moles C6H3Cl3
Moles of Chlorine: 2*n2 = n4 + 1*0.284 moles + 2* 0.017 moles + 3* 0.0028 moles
Moles of chlorine = 0.339 moles B
Step 4: Calculate the excess of benzene
For 1 mol benzene we need 1 mol Cl2
For 0.339 moles Cl2 we have 0.339 moles benzene
% of excess = (total amount of moles - moles of benzene) / moles of benzene
% of excess = ((1.14 - 0.339)/ 0.339) * 100 % = 236 %
Step 5: Calculate the conversion of benzene
Conversion of benzene = (1.14 moles - 0.832 moles ) / 1.14 moles
Conversion of benzene = 0.27
Step 6: the fractional yield of monochlorobenzene
Yield = ( moles of monochlorobenzene produced / total moles) * 100%
Yield = (0.284 moles / 0.339 moles ) * 100 %
Yield = 83.8%
Step 7: Calculate mass of gass
Mass of gass (Cl2) = (Moles of Cl2 * molar mass of Cl2) * 98%
Mass of gass (Cl2) = (0.339 moles*70.9 g/mol ) * 0.98
MAss of gass = 23.6 grams
Step 8: Calculate mass of liquid
Mass of liquid = total amount of moles * molar mass of C6H6
Mass of liquid = 1.14 moles * 78.11 g/mol
Mass of liquid = 89.0 grams
Step 9: Calculate the mass ratio
Mass ratio = mass gass / mass liquid
Mass ratio = 23.6 grams / 89.0 grams
Mass ratio = 0.265
In this exercise we have to use the knowledge of chemistry to calculate the compositions of benzene, in this way we find that
a) 236 %
b) 0.27
c) 83.8%
d) 0.265
First, let's punctuate the information given in the text, which can be summarized in:
[tex]65.0 \ wt\% \ C6H6[/tex]MM: [tex]C6H6 = 78.11 g/mol[/tex]
[tex]32.0 \ wt\% \ C6H5Cl[/tex]MM: [tex]C6H5Cl = 112.56 g/mol[/tex]
[tex]2.5 \ wt\% \ C6H4Cl2[/tex]MM: [tex]C6H4Cl2 = 147.01 g/mol[/tex]
[tex]0.5 \ wt\% \ C6H3Cl3[/tex] MM: [tex]C6HCl3 = 181.45 g/mol[/tex]
Now writing the equations of the compositions given above, we can find that, general form:
[tex]A + B \rightarrow C +D[/tex]
equations of the compositions form:
[tex]C6H6 + Cl2 \rightarrow C6H5Cl + HCl[/tex] [tex]C6H5Cl + Cl2 \rightarrow C6H4Cl2 + HCl[/tex] [tex]C6H4Cl2 + HCl \rightarrow C6H3Cl3 + HCl[/tex]
from the informed data and equations we can now calculate the number of moles in each of the forms, so lets suppose the total mass in the reactor is 100 grams, in that case we have:
[tex]Number of moles = mass / molar\ mass[/tex]
C6H6: [tex]65.0 / 78.11 = 0.832 moles[/tex] C6H5Cl: [tex]32.0 / 112.56 = 0.284 moles[/tex] C6H4Cl2: [tex]2.5 / 147.01 = 0.017 moles[/tex] C6H3Cl3: [tex]0.50 / 181.45 = 0.0028 moles[/tex] Total number of moles : [tex]0.832 + 0.284 + 0.017 + 0.0028 = 1.14 moles[/tex]
The liquid part can be rewritten as:
[tex]C6H6 + Cl2 \rightarrow C6H5Cl + HCl\\n1 \rightarrow n3 + n4 ( HCl)[/tex]
The gas part can be rewritten as:
[tex]n2 (Cl2) + n3 \rightarrow 1.14 moles[/tex]
Moles of Carbon: [tex]1.14 moles[/tex] Moles of Hydrogen: [tex]6*0.832 + 5*0.284 + 4*0.017 + 3*0.0028 + n4[/tex] Moles of Chlorine: [tex]0.339 moles[/tex]
Now we can calculate the excess benzene from the equations described above, thus we find:
For 1 mol benzene we need 1 mol Cl2 For 0.339 moles Cl2 we have 0.339 moles benzene
[tex]\% \ of \ excess = (total \ amount \ of \ moles - moles \ of \ benzene) / moles \ of \ benzene[/tex]
[tex]\% \ of \ excess = ((1.14 - 0.339)/ 0.339) * 100 = 236 \%[/tex]
Calculate the conversion of benzene, we have:
[tex]Conversion \ of \ benzene = (1.14 moles - 0.832 moles ) / 1.14 moles = 0.27[/tex]
The fractional yield of monochlorobenzene, that can be say:
[tex]Yield = ( moles\ monochlorobenzene / total\ moles) * 100\\Yield = (0.284 moles / 0.339 moles ) * 100 \\Yield = 83.8%[/tex]
Calculate mass of gass, we have:
[tex]Mass of gass (Cl2) = (Moles of Cl2 * molar mass of Cl2) * 98\\Mass of gass (Cl2) = (0.339 moles*70.9 g/mol ) * 0.98\\Mass of gass = 23.6 grams[/tex]
Calculate mass of liquid, we have that:
[tex]Mass \ of \ liquid = total \ amount \ of \ moles * molar \ mass \ of \ C6H6\\Mass \ of \ liquid = 1.14 moles * 78.11 g/mol\\Mass \ of\ liquid = 89.0 grams[/tex]
Calculate the mass ratio, we can say that:
[tex]Mass \ ratio = mass \ gass / mass \ liquid\\Mass \ ratio = 23.6 grams / 89.0 grams\\Mass \ ratio = 0.265[/tex]
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Gaseous ammonia chemically reacts with oxygen (O2)gas to produce nitrogen monoxide gas and water vapor. Calculate the moles of ammonia needed to
produce 0.090 mol of water.
Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.
An aqueous solution is produced by dissolving 1.5 g of barium hydroxide (Ba(OH)2(aq) in enough water
to make 0.250 L.
a) write the dissociation reaction of barium hydroxide
b) calculate the molar concentration of OH(aq)
13
c) calculate pH
Answer:
A. Ba(OH)₂ (aq) <==> Ba²⁺ (aq) + 2OH¯ (aq)
B. The molar concentration of OH¯ is 0.072 M
C. The pH of the solution is 12.86
Explanation:
A. Dissociation equation
Barium hydroxide Ba(OH)₂ dissolves in water by the following equation:
Ba(OH)₂ (aq) <==> Ba²⁺ (aq) + 2OH¯ (aq)
B. Determination of the molar concentration of OH¯.
We'll begin by calculating the number of mole in 1.5 g of Ba(OH)₂. This can be obtained as follow:
Mass of Ba(OH)₂ = 1.5 g
Molar mass of Ba(OH)₂ = 137 + 2(16 + 1)
= 137 + 2(17)
= 137 + 34
= 171 g/mol
Mole of Ba(OH)₂ =?
Mole = mass / Molar mass
Mole of Ba(OH)₂ = 1.5 / 171
Mole of Ba(OH)₂ = 0.009 mole
Next, we shall determine the molarity of Ba(OH)₂. This can be obtained as follow:
Mole of Ba(OH)₂ = 0.009 mole
Volume of solution = 0.250 L
Molarity of Ba(OH)₂ =?
Molarity = mole / Volume
Molarity of Ba(OH)₂ = 0.009 / 0.250
Molarity of Ba(OH)₂ = 0.036 M
Finally, we shall determine the molar concentration of OH¯.this can be obtained as follow:
Ba(OH)₂ (aq) <==> Ba²⁺ (aq) + 2OH¯ (aq)
From the balanced equation above,
1 mole of Ba(OH)₂ produced 2 moles OH¯.
Therefore, 0.036 M Ba(OH)₂ will produce = 0.036 × 2 = 0.072 M OH¯.
Therefore, the molar concentration of OH¯ is 0.072 M
C. Determination of the pH.
We'll begin by calculating the pOH of the solution. This can be obtained as follow:
Concentration of OH¯, [OH¯] = 0.072 M
pOH =?
pOH = –Log [OH¯]
pOH = –Log 0.072
pOH = 1.14
Finally, we shall determine the pH. This can be obtained as follow:
pOH = 1.14
pH =?
pH + pOH = 14
pH + 1.14 = 14
Collect like terms
pH = 14 – 1.14
pH = 12.86