Question

For which of the mixtures will Ag2SO4(s) precipitate? 

 150.0 mL of 0.10 M Na2SO4(aq) and 5.0 mL of 0.20 M AgNO3(aq)

 150.0 mL of 0.10 M Na2SO4(aq) and 5.0 mL of 0.30 M AgNO3(aq)

 150.0 mL of 0.10 M NazSO4(aq) and 5.0 mL of 0.40 M AgNO3(aq)

 150.0 mL of 0.10 M Na2SO4(aq) and 5.0 mL of 0.50 M AgNO3(aq)

Which of the compounds is more soluble in an acidic solution than in pure water?

 Zn(OH)

 KCIO4

 PbS

 CuBr

 CuCN

A certain indicator, HA, has a K_a value of 1.6 x 10^-7. The protonated form of the indicator is yellow and the ionized form is blue. 

What is the pK_a of the indicator? 

pK_{a = _______} 

What is the color of this indicator in a solution with pH = 9? 

•  green

•  yellow

•  blue

Answer 1