Grade 12 Dubai Internationa! School work sheet-3 SECTION 4 SHORT ANSWER Answer t
ID: 820098 • Letter: G
Question
Grade 12 Dubai Internationa! School work sheet-3
SECTION 4
SHORT ANSWER Answer the following questions in the space provided.
1. Match the solution type on the right to the corresponding relationship between
the ion product and the Kspfor that solution, listed on the left.
_____ The ion product exceeds the (a) The solution is saturated; no
more solid will dissolve.
Ksp- , ' ;
_____ The ion product equals the (b) The solution is unsaturated;
no solid is present.
_____ The ion product is less than (c) The solution is
supersaturated; solid may form
the Ksp. if the solution is disturbed.
2. Silver carbonate, Ag2CO3, makes a saturated solution with Ksp=10" .
a. Write the equilibrium expression for the dissolution of Ag2CO3.
b. In this system, will the foward or reverse reaction be favored if extra Ag+ ions are added?
PROBLEMS Write the answer on the line to the left. Show all your work in the space provided.
3. When the ionic solid XC12 dissolves in pure water to make a saturated solution, experiments show that 2x10 mol/L of X ions go into solution.
___________________ a. Write the equation showing the
dissolution of XC12
and the corresponding equilibrium
expression.
b. Calculate the value of Kspfor XC12.
Grade 12 Dubai International School work sheet-3
c. Refer to Figure 4.1 of the text. Would XC12 be more soluble or less soluble than PbCl2 at the same temperature?
4. The solubility of Ag3PO4 is 2.1 x 10 4 g/100. g.
a. Write the equation showing the dissolution of this ionic solid.
b. Calculate the molarity of this saturated solution.
c. What is the value of Kspfor this system?
5. As PbCl2 dissolves, [Pb2+ ] = 2.0x 10"1 mol/L and [Cf ] = 1.5 x 10~2 mol/L.
______________________________ a. Write the equilibrium expression for the
dissolution of PbCl2.
b. Compute the ion product, using the data given above.
Explanation / Answer
1. Match the solution type on the right to the corresponding relationship between
the ion product and the Ksp for that solution, listed on the left.
_____ The ion product exceeds the .(c) The solution is
; solid may form
the Ksp. if the solution is disturbed.
_____ The ion product equals the(a) The solution is saturated; no
more solid will dissolve.
Ksp- , ' ;
_____ The ion product is less than supersaturated (b) The solution is unsaturated;
no solid is present
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