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Science Clinic => Chemistry => Topic started by: nmorano1 on Feb 15, 2020

Title: What is the pH of a 0.20 M H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 ...
Post by: nmorano1 on Feb 15, 2020

Question 1

Calculate the concentration of bicarbonate ion, HCO3-, in a 0.050 M H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.
◦ 2.2 × 10-8 M
◦ 1.5 × 10-4 M
◦ 5.6 × 10-11 M
◦ 4.3 × 10-7 M

Question 2

What is the pH of a 0.20 M H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 × 10-4 and Ka2 = 1.0 × 10-11?
◦ 4.59
◦ 2.29
◦ 3.89
◦ 5.57

Title: What is the pH of a 0.20 M H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 ...
Post by: Carissamariew on Feb 15, 2020

Answer 1

1.5 × 10-4 M

Answer 2

2.29