Chapter 9 Acids and Bases fully
solved & updated (graded A+)
If the [H3O+] in a cup of coffee is 1.0 x 10−5 M, then the [OH−] can be
calculated as follows: - answer 1.0 x 10−9 M
If [H3O+] = 1.2 x 10-5 M for a solution, what is its pH? - answer 4.92 ( acidic
because pH < 7 )
If the pH of a solution is 8.50, what is the [H3O+]? - answer 3.2 x 10-9 M
( basic because [H3O+]> 1 x 10-7 M )
What is the pH of a cleaning solution with a [H3O+] = 7.4 x 10-9 M H3O+? -
answer 8.13
What is the balanced equation for the acid-base reaction of nitrous acid with
lithium hydroxide? - answer LiOH(aq) + HNO2(aq)=H2O(l) + LiNO2(aq)
What is the net ionic equation for the acid-base reaction of hydrobromic acid
with sodium hydroxide? - answer -OH(aq) + H+(aq) H2O(l
What are the products of the acid-base reaction of sodium carbonate with
acetic acid? - answer CO2(g) + H2O(l) + 2 NaCH3COO(aq)
What is the molarity of an HCl solution if 22.5 mL of a 0.100 M NaOH solution
are needed to titrate a 25.0 mL sample of the acid? - answer 0.0900 M HCl
What is the molarity of an HCl solution if 43.6 mL of a 0.125 M KOH solution
are needed to titrate a 25.0 mL sample of the acid according to the equation
below? - answer 0.218 M HCl
solved & updated (graded A+)
If the [H3O+] in a cup of coffee is 1.0 x 10−5 M, then the [OH−] can be
calculated as follows: - answer 1.0 x 10−9 M
If [H3O+] = 1.2 x 10-5 M for a solution, what is its pH? - answer 4.92 ( acidic
because pH < 7 )
If the pH of a solution is 8.50, what is the [H3O+]? - answer 3.2 x 10-9 M
( basic because [H3O+]> 1 x 10-7 M )
What is the pH of a cleaning solution with a [H3O+] = 7.4 x 10-9 M H3O+? -
answer 8.13
What is the balanced equation for the acid-base reaction of nitrous acid with
lithium hydroxide? - answer LiOH(aq) + HNO2(aq)=H2O(l) + LiNO2(aq)
What is the net ionic equation for the acid-base reaction of hydrobromic acid
with sodium hydroxide? - answer -OH(aq) + H+(aq) H2O(l
What are the products of the acid-base reaction of sodium carbonate with
acetic acid? - answer CO2(g) + H2O(l) + 2 NaCH3COO(aq)
What is the molarity of an HCl solution if 22.5 mL of a 0.100 M NaOH solution
are needed to titrate a 25.0 mL sample of the acid? - answer 0.0900 M HCl
What is the molarity of an HCl solution if 43.6 mL of a 0.125 M KOH solution
are needed to titrate a 25.0 mL sample of the acid according to the equation
below? - answer 0.218 M HCl
