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Chemistry
Tutor: None Selected Time limit: 1 Day

consider the decomposition reaction of indium bromate where 7.50 grams of indium bromate is heated to produce oxygen and indium bromide. write the balanced equation for the reaction and find the mole ratios of the reactants and products required to  solve ANY stoichiometric problem. then calculate the volume of 0.1000 M silver nitrate required to completely react with all the bromide ion formed in this decomposition

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Aug 5th, 2015

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BALANCED CHEMICAL EQUATION:

3In(BrO3)3 ----------  3InBr3 +27/2 O2

MOLES OF INDIUM BROMATE:

Moles = given mass/molecular mass

Moles = 7.5/242.7202

Moles= 0.0308 mol of In(BrO3)3

MOLE RATION OF REACTANT AND PRODUCTS:

3 In(BrO3)3 = 3InBr3

0.0308 mol of In(BrO3)3 = (3*0.0308)/3

  = 0.0308 mol of InBr3

1InBr3 = 9Br-

0.0308 mol of InBr3 = (9*0.0308)/1

  = 0.2780mol of Br-

AgNO3 + Br- -------- AgBr + NO3-

1Br- = 1AgNO3

0.2780 mol Br- = (1*0.2780)/1

  = 0.2780mol AgNO3

Molarity of AgNO3 = mol of AgNO3/volume in L

Volume in L = mol of AgNO3/ molarity of AgNO3

Volume in L = 0.2780/0.1

Volume of AgNO3 required = 2.7809L


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Aug 5th, 2015

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