1.) When aqueous solutions of lead(II) nitrate and potassium iodide are mixed, w

Question

1.) When aqueous solutions of lead(II) nitrate and potassium iodide are mixed, what is the formula for the insoluble solid (precipitate) that forms?

a.) KNO3(s)

b.) PbI(s)

c.) PbI2(s0

d.) Pb(NO3)2(s)

e.) PblO3(s)

2.) Which of the following should react with sulfuric acid, H2SO4(aq), to form an insoluble solid (a precipitate)?

a.) KCl

b.) Na3PO4

c.) Mg(NO3)2

d.) Ba(NO3)2

e.) None of these

3.) When excess NaOH(aq) is slowly added to a solution containing aluminum ion, a precipitate forms at first but then re-dissolves. What is the formula for the aluminum product after excess NaOH has been added?

a.) Al(OH)3(s)

b.) Al(OH)3-(aq)

c.) Al(OH)4-(aq)

d.) Al(OH)3+(aq)

e.) Al2O3(s)

Explanation / Answer

1     c.) PbI2(s)

2     d.) Ba(NO3)2

3     c.) Al(OH)4-(aq)

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