Question

Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. Suppose 61. g of hydrobromic acid is mixed with 56.7 g of sodium hydroxide. Calculate the maximum mass of sodium bromide that could be produced by the chemical reaction. Round your answer to 2 significant digits.

Answer 1

NaOH + HBr -> NaBr + H2O

1 mole NaOH require 1 mole HBr

40 g NaOH require 81 g HBr

56.7 g NaOH require 81×56.7/40 g HBr

= 114.8

Since we have less than this HBr thus HBr is limiting reagent.

81 g HBr give 102.89 g NaBr

61 g HBr give 102.89×61/81 g HBr

= 77 g HBr

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