A ) Will a precipitate of BaSO 4 form when 75.0 mL of 0.020 M BaCl 2 is added to
ID: 901482 • Letter: A
Question
A)
Will a precipitate of BaSO4 form when 75.0 mL of 0.020 M BaCl2 is added to 125.0 mL of 0.040 M Na2SO4? Ksp for BaSO4 = 1.1x10-10
Yes
No
B)
Which of these statements is true?
a) If Q < Ksp, then a precipitate will form
b) Adding NaBr to a saturated solution of AgBr will decrease the solubility of AgBr.
c) Adding strong acid will have no effect on the solubilty of Mg(OH)2.
d) BaF2 is less soluble in water than CaF2
C)
What is the solubility of lead iodide in a solution of 0.31 M lead nitrate, Pb(NO3)2? Ksp of PbI2 = 9.8x10-9
To enter your answer in scientific notation, use "E" for the "x10". 1.0x10-9 would be 1.0E-9.
D)
Which of the following aqueous solutions would decrease the solubility of Fe(OH)3(s)?
HC2H3O2
NaOH
NH4NO3
HCl
a.Yes
b.No
Explanation / Answer
A) Yes because Q> Ksp
B ) b) Adding NaBr to a saturated solution of AgBr will decrease the solubility of AgBr.
C)PbI2 , Ksp = (s+0.31)*(2s)^2
9.8*10^-9 = 0.31 * 4s^2
= 8.89*10^-5 M
D) NaOH
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