Question

Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide...

Aqueous hydrobromic acid

HBr

will react with solid sodium hydroxide

NaOH

to produce aqueous sodium bromide

NaBr

and liquid water

H2O

. Suppose 15. g of hydrobromic acid is mixed with 11.4 g of sodium hydroxide. Calculate the maximum mass of sodium bromide that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.

Homework Answers

Answer #1

Balanced equation is

HBr + NaOH ------> NaBr + H2O

Number of moles of HBr = 15g / 80.91 g/mol = 0.185 mole

Number of moles of NaOH = 11.4 g / 40.0 g/mol = 0.285 mole

from the balanced equation we can say that

1 mole of HBr requires 1 mole of NaOH so

0.185 mole of HBr will require 0.185 mole of NaOH

but we have 0.285 mole of NaOH which is in excess so

HBr is limiting reactant

1 mole of HBr produces 1 mole of NaBr so

0.185 mole of Hbr will produces 0.185 mole of NaBr

1mole of NaBr = 102.894 g

so 0.185 mole of NaBr = 19.0g

Therefore, the mass of NaBr produced will be 19.0 g

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