chem php id 2216253 0/13/2015 11:55 PM 13.5/17 Gradeb Print eloletor yd Periodic

Question

chem php id 2216253 0/13/2015 11:55 PM 13.5/17 Gradeb Print eloletor yd Periodic Table stion 4 of 17 Incorrect Map pling learming The balanced equation for the reaction of aqueous Pb(CIOs)2 with aqueous Nal is shown below. What mass of precipitate will form i# 1.50 L of concentrated Pb/CIOahz is mixed with 0550 L of 0.270 M Nal? Assume the reaction goes to completion. Number 68.45 There is a hint availablel View the hint by cicking on the botiom divider bar. Cick on the divider bar again to hide the hint Close O Prev ous Give Up & View Solution e Check Answer Hint Next Exit

Explanation / Answer

1) NaI moles = 0.55 x 0.27 = 0.1485

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

2 mol of NaI produce    -------------   1 mol PbI2

0.1485 mol of NaI        -------------   ?? PbI2

moles of PbI2 = 0.1485 x 1 / 2

                       = 0.07425

molar mass of PbI2 = 461 g/mol

moles = mass / molar mass

0.07425 = mass / 461

mass of PbI2 = 34.22 g

2)

i did not understand the problem.in sapling there will be hint. please send that hint

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