Acids and Bases

Naming

100

What would be the name of the following acid?

H₂SO₄

sulfuric acid

sulfate ion- I ATE something ICky

200

Name the following base

Sr(OH)₂

strontium hydroxide

300

Name the following acid

H₃PO₃

phosphorous acid

phosphite- rITEeOUS

400

Write the formula for nitrous acid

HNO₂

riTEeOUS

nitrite

500

write the formula for hydrofluoric acid

HF

pH/pOH & [H+][OH-]

100

What is the pH of a solution with a hydronium ion concentration of 0.0235M

1.629

200

What is the pOH of a solution with an [H₃O+] of 0.0235 M?

12.371

300

What is the hydronium ion concentration of a solution with a pH of 10.65?

2.2 x 10^-11M

400

What is the hydroxide ion concentration of a solution with a pOH of 2.34?

0.0046M

500

What is the hydroxide ion concentration of a solution with a pH of 4.55?

3.5 x 10^-10M

Ka/Kb/Kw Expressions

100

Write the K_a expression for the dissociation of the weak acid, HCO₃

K_a=[CO₃^-][H₃O⁺]/[HCO₃]

200

Write the K_b expression for the following weak base

NH₃

K_b=[NH₄⁺][OH^-]/[NH₃]

300

If the concentration of hydronium ion in solution is 5.67 x 10^-5 M, what is the concentration of hydroxide ion?  What is the pH?

1.76 x 10^-11 M; 4.25

400

Write the K_a expression for the dissociation of the following weak acid

H₂SO₄

K_a= [HSO₄^-][H₃O⁺]/[H₂SO₄]

500

Write the K_a expression for the following weak acid

H₃PO₄

K_a= [H₂PO₄^-][H₃O⁺]/[H₃PO₄]

Ka/Kb Calculations

100

Calculate the K_a for the following acid using the given information

0.220 M solution of H₃AsO₄ with a pH of 1.50

K_a=5.4 x 10^-3

200

Calculate the K_a for the following acid using the given information

0.0400 M solution of HClO₂ with a pH of 1.80

K_a=1.1 x 10^-2

300

Calculate the K_a for the following acid using the given information

0.100 M solution of HNO₂ with a pH of 2.38

K_a=1.8 x 10^-4

400

Calcuate the K_b of a 0.345 M solution of KOH with a pH of 11.700.

K_b=7.39 x 10^-5

500

Calcuate the K_b of a 0.0200 M solution of CsOH with a pH of 10.985.

K_b=4.90 x 10^-5

Neutralization Reactions/Misc.

100

Write the balanced neutralization reaction for sulfuric acid and potassium hydroxide

H₂SO₄(aq) + 2KOH(aq) --> 2H₂O(l) + K₂SO₄

200

Write the balanced chemical reaction for the dissociation of phosphoric acid in water and identify the conjugate acid base pairs present.

H₃PO₄(aq) + H₂O(l) --> H₃O⁺(aq) + H₂PO₄^-(aq)

acid + base --> conjugate acid + conjugate base

H₃PO₄(aq) H₂PO₄^-(aq)

H₂O(l) H₃O⁺(aq)

300

Write the balanced neutralization reaction for nitric acid and calcium hydroxide

2HNO₃(aq) + Ca(OH)₂(aq) --> 2H₂O(aq) + Ca(NO₃)₂

400

Write the balanced chemical reaction for the disassociation of ammonia in water (weak base) then identify the conjugate acid/base pairs.

NH₃(aq) + H₂O(l) -> NH₄⁺(aq) + OH^-(aq)

base + acid --> conjugate acid + conjugate base

500

If a strong acid is placed in aqueous solution to produce its conjugate base, how does the strength of the conjugate base compare to the strength of the initial acid?

conjugate base of a strong acid will be a weak base