What is the solubility product constant (Ksp) used for?

• A. To measure the total mass of a solute that can dissolve in a solvent
• B. To determine the concentration of a solute in a saturated solution
• C. To calculate the solubility of a solute in a given solvent
• D. To compare the solubilities of different solutes in the same solvent

In the preparation of salts, the method employed will depend on the?

• A. composition
• B. dissociating ability
• C. stability to heat
• D. precipitating ability

CU2S(s) + O2(g) → 2CU(s) + SO2(g) What is the change in the oxidation number of copper in the reaction above?

• A. +1 to 0
• B. 0 to +2
• C. +2 to +1
• D. 0 to +1

(a)(i) Give the reason why copper turnings dissolve in AgNO\(_3\) solution but remain insoluble in Pb(NO\(_3\) )\(_2\) solution.

(ii) Copper turnings of mass 1.06g were placed in 250 cm\(^3\) of 0.20 mol dm\(^{-3}\) AgNO\(_3\). Calculate the amourt of silver ions present. [Cu = 63.5]

(iii) Determine whether all the copper in (a)(ii) above will discolvo in the solution. The equation for the reaction is CU\(_{(S)}\) + 2Ag\(^+_{(aq)}\) --> Ag\(_{(aq)}\) + Cu\(^{2+}_{(aq)}\)

(b)(i) List cheicil properties of acids

(ii) Give two large scale uses of HNO\(_3\)

(iii) Write an equation for the action of heat on each of the following compounds: I. Pb(NO\(_3\))\(_2\)

Il. AgNO\(_3\).

(c)(i) State what would be observed if a piece of damp blue litmus paper is dropped into a glass jar of chlorine.

(ii) Name the type of reaction which occurs in (c)(i) above.

(iii) Give the property of chlorine which is exhibited in the reaction in (c)(i) above.

(i) Name two products obtained directly from the destructive distillation of coal.

(ii) Give one use of each product named in (d)(i) above.

The following are chemical entities identifiable during qualitative analysis:

i. SO^2?₄

ii. H₃O⁺

iii. NH⁺⁴ iv. OH^?

Which of them can be detected by litmus paper?

• A) ii and iv only
• B) ii only
• C) i and iii only
• D) iv only

Which of the following is NOT the correct product formed when the parent metal is heated in air?

• A) calcium oxide
• B) sodium oxide
• C) Copper (II) oxide
• D) triiron tetraoxide

What volume of 11.0M hydrochloric acid must be diluted to obtain 1dm³ of 0.05M acid?

• A) 0.05dm³
• B) 0.10dm³
• C) 0.55dm³
• D) 11.0dm³

Which of the following ions has an electron configuration different from the other?

• A.₁₇CI^-
• B.₈O^2-
• C.₁₂Mg²⁺
• D.₁₃AI³⁺

What current will deposit 3.25g of zinc in 2hrs? [Zn = 65, F = 96500 mol-]

• A) 3.25A
• B) 2.00A
• C) 1.34A
• D) 0.67A

Which of the following is an example of a chemical change?

• A) dissolution of salt in water
• B) rusting of iron
• C) melting of ice
• D) separating a mixture by distillation