Question 1
What is the change in pH when 0.30 liters of 0.020 M KOH is added to a 1.0-liter solution containing 0.25 M HF and 0.78 M NaF (Kafor HF is 7.2 10–4)?
◦
0.01◦
3.65◦
0.51◦
–0.08◦
–0.21Question 2
What is the molarity of a sodium hydroxide solution if 29.2 mL of this solution reacts exactly with 22.30 mL of 0.253 M sulfuric acid?
◦
0.193 M◦
0.773 M◦
7.39 M◦
0.386 M◦
0.219 M