Gas Pressure problems
Atmospheric Pressure example question
What is the pressure, in Kilopascals and in Atmospheres, if a force of 
is exerted on an area of 5.00 cm2?
Solution to this Atmospheric Pressure practice problem is given in the video below!
Atmospheric Pressure example problem
A diver reaches a depth of 30.0 m. What is the pressure in atmospheres that is exerted by this depth of water? What is the TOTAL pressure the diver experiences at this depth?
Solution to this Atmospheric Pressure practice problem is given in the video below!
Titrations in Chemical Reactions problems
Acid-Base Titration example question
A 2.000-g sample of a sulfuric acid solution that is 96.5% H2SO4 by mass is dissolved in a quantity of water and titrated. What volume of 0.3580 M KOH(aq) is required for the titration? Assume that at the equivalence point the solution in the flask is K2SO4(aq).
Solution to this Acid-Base Titration practice problem is given in the video below!
Precipitation Titration example problem
A mixture of 0.1015 g of NaCl and 0.1324 g KCl is dissolved in water and titrated with 0.1500 M AgNO3(aq). What volume of the AgNO3(aq) will be needed to reach the endpoint?
Solution to this Precipitation Titration practice problem is given in the video below!
Redox Titration example
A 20.00-mL sample of KMnO4(aq) is required to titrate 0.2378 g sodium oxalate in an acidic solution. How many milliliters of this same KMnO4(aq) are required to titrate a 25.00-mL sample of 0.1010 M FeSO4 in an acidic solution?
2MnO4−(aq) + 16H+(aq) + 5C2O42−(aq) → 2Mn2+(aq) + 8H2O(l) + 10CO2(g)
Solution to this Acid-Base Titration practice problem is given in the video below!
Oxidation & Reduction in Chemical Reactions problems
Oxidation Number of Atoms in Compounds and Ions example question
Assign an oxidation number to each atom in
a. Al2O3
b. P4
c. CH3F
d. HAsO42−
e. NaMnO4
f. ClO2−
g. CsO2
Solution to this Oxidation Number of Atoms in Ions and Compounds practice problem is given in the video below!
Precipitate Formation in Chemical Reactions problems
Precipitate in Chemical Reaction example question
Predict whether a precipitation reaction will occur in each of the following cases. If so, write a net ionic equation for the reaction.
(a) MgSO4(aq) + KOH(aq) → ?
(b) FeCl3(aq) + Na2S(aq) → ?
(c) Sr(NO3)2(aq) + Na2SO4(aq) → ?
Solution to this Precipitate Formation in Chemical Reactions practice problem is given in the video below!
Reactions of Acids & Bases problems
Acid-Base Neutralization example question
Calcium hydroxide is used to neutralize a waste stream of hydrochloric acid. Write
a. A complete-formula equation,
b. An ionic equation
c. A net ionic equation for this neutralization reaction.
Solution to this Acid-Base Neutralization Reaction practice problem is given in the video below!
Compound & Ion Molarity problems
Molarity of Compounds example question
How many milliliters of 1-butanol, CH3CH2CH2CH2OH, (d = 0.810 g/mL) are required to prepare 725 mL of a 0.350 M aqueous solution of this solute?
Solution to this Compound Molarity practice problem is given in the video below!
Molarity of Ions example problem
Seawater is essentially 0.438 M NaCl and 0.0512 M MgCl2, together with several other minor solutes. What are the molarities of Na+, Mg2+, Cl– in seawater?
Solution to this Ion Molarity practice problem is given in the video below!
Yields of Chemical Reactions problems
Percent Yield example question
How many grams of isopentyl alcohol are needed to make 433 grams isopentyl acetate in the reaction given below if the expected yield is 78.5%? Assume the acetic acid is in excess.
CH3COOH + HOCH2CH2CH(CH3)2 → CH3COOCH2CH2CH(CH3)2 + H2O
Solution to this Percent Yield practice problem is given in the video below!
Limiting Reactants problems
Limiting Reactants example question
One way to produce hydrogen sulfide gas is by the reaction of iron(II) sulfide with hydrochloric acid:
FeS(s) + 2HCl(aq) → FeCl2(aq) + H2S(g)
If 10.2 g HCl is added to 13.2 g FeS, how many grams of H2S can be formed? What is the mass of the excess reactant remaining?
Solution to this Limiting Reactants practice problem is given in the video below!
Balancing Chemical Equations problems
Balancing Chemical Equations example question
Balance the following equations using integral coefficients:
SiCl4 + H2O → SiO2 + HCl
PCl5 + H2O → H3PO4 + HCl
CaO + P4O10 → Ca3(PO4)2
Solution to this Balancing Chemical Equation practice problem is given in the video below!
Writing Balanced Chemical Equation example problem
Write a balanced equation for the reaction between solid calcium hydroxide and aqueous phosphoric acid to form solid calcium phosphate and water. Include symbols indicating the physical form of each reactant and product.
Solution to this Writing Balanced Equations practice problem is given in the video below!
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