Chemistry Practice
Name___________________
Formulas
Kw = 1.00 x 10-14
pH = - log [H+]
Kw = [H+] [OH-]
pOH = - log [OH-]
1. Fill in the following table.
[H+]
pH
4.4 x 10-3
2.36
pH + pOH = 14
[H+] = 10-pH
[OH-] = 10-pOH
[OH-]
2.3*10^-12
pOH
11.64
acid or base
acid
2.29*10^-10
9.64
4.3*10^-5
4.36
basic
4.55E-10
9.34
2.2 x 10-5
4.66
basic
.0021
2.67
4.677E-12
11.33
acid
4.17E-10
9.38
2.40E-5
4.62
basic
1.47E-7
6.83
6.8 x 10-8
7.62
acid
1.23E-5
4.91
8.13E-10
9.09
acid
1.89E-4
3.8
based
5.3 x 10-11
10.2
4. What is the pH of a 4.8 x 10-5 M solution of hydrochloric acid?
-log(4.8E-5
4.32
5. What is the pH of a 7.9 x 10-3 M solution of potassium hydroxide?
-Log(7.9E-3
14-2.14
11.86
6. What is the concentration of a nitric acid solution that has a pH of 2.18?
10^-2.18=.0066M
7. What is the concentration of a sodium hydroxide solution with a pH of 12.54?
10^-12.54
2.88
8. List the six strong acids
HBr H2SO4 HI HNO3 HCl HClO4
9. List four properties of a base and four properties of an acid. What color is BTB in
acid, base, neutral solutions?
Acids taste sour, turns the paper red, can corrode things, nuturalize bases.
Bases turn blue
natural doesn’t change the color
10. What is the concentration of a hydrochloric acid solution if 5.00 mL of the
hydrochloric acid solution is exactly neutralized with 22.50 mL of a 0.100 M
sodium hydroxide solution?
11. Complete the equations for the following:
H2SO4 (aq) +
KOH (aq)
🡪
Ca(OH)2 (aq) +
HCl (aq) 🡪
Ba(OH)2 (aq) +
H2C2O4 (aq) 🡪
12. Label the acid, base, conjugate acid and conjugate base in the following
H2O
+
NH3
🡪
NH4+ +
OH-
HF
+
H2O
🡪
H3O+
+
F-
S2-
+
H2O
🡪
HS- +
OH-
13. How many grams of sodium iodide are needed to make 500.0 mL of a 0.125 M
aqueous solution of sodium iodide?
14. What is the concentration, in moles per liter, of a solution of 12.0 grams of sodium
chloride in enough water to make 250.0 mL of the solution?
15.
Describe the equipment and procedures for the titration lab and how to do the
calculations.
16. How many times higher is the H+ concentration in a solution of pH of 2 than a
solution with a pH of 6?
17. Calculate the concentration of hydrochloric acid (HCl) if 15.0 mL of HCl is just
neutralized with 22.0 mL of 0.125 M sodium hydroxide, NaOH.
18. Calculate the concentration of sulfuric acid (H2SO4) if 15.0 mL of H 2SO4 is just
neutralized with 22.0 mL of 0.125 M sodium hydroxide, NaOH.
19. Describe the H+/OH- concentrations for an acidic, basic and neutral solution.