1) A student measures the OH- concentration in a saturated aqueous solution of s

Question

1) A student measures the OH- concentration in a saturated aqueous solution of silver hydroxide to be 1.36×10-4 M. Based on her data, the solubility product constant for silver hydroxide is _______

2) A student measures the molar solubility of silver sulfide in a water solution to be 2.98×10-17 M. Based on her data, the solubility product constant for this compound is ______

3) A student measures the molar solubility of lead bromide in a water solution to be 1.14×10-2 M. Based on her data, the solubility product constant for this compound is _________

Explanation / Answer

Silver hydroxide is AgHO----> Ag+ +OH-

[OH-] = [Ag+] = 1.36*10-4

KSp= solubility product= [Ag+] [OH-] = (1.36*10-4)2 =1.85*10-8

2. Ag2S---> 2Ag+ S2-

Ksp =[Ag+]2 [S2-]

given x= [S2-] 2x= 2.98*10-17,, x= 1.49*10-17

KSp = (2.98*10-17)2*1.49*10-17=8.88*10-51

3. PbBr--- Pb+2 +2Br-

given [Pb+2] -1.14*10-2M [Br]= 2*1.14*10-2 =2.28*10-2M

Ksp= [Pb+2] [Br-]2= 1.14*10-2*(2.28*10-2)2 =5.93*10-6

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