Question

In: Chemistry

Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI. Include phases. What...

Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI. Include phases.

What mass of precipitate will form if 1.50 L of highly concentrated Pb(ClO3)2 is mixed with 0.700 L of 0.110 M NaI? Assume the reaction goes to completion.

Solutions

Expert Solution

The balanced equation is

Pb(ClO3)2 (aq) + 2 NaI (aq) ------> PbI2 (s) + 2 NaClO3 (aq)

Number of moles of NaI = molarity * volume of solution in L

Number of moles of NaI = 0.110 * 0.700 = 0.0770 mol

From the balanced equation we can say that

2 mole of NaI produces 1 mole of PbI2 so

0.0770 mole of NaI will produce

= 0.0770 mole of NaI *(1 mole of PbI2 / 2 mole of NaI)

= 0.0385 mole of PbI2

mass of 1 mole of PbI2 = 461.01 g so

the mass of 0.0385 mole of PbI2 = 17.7 g

Therefore, the mass of PbI2 produced would be 17.7 g


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