Question

Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. Suppose 3.24 g of hydrobromic acid is mixed with 2.3 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.

Answer 1

Answer:

7.20 X 10^-2 gm

Explanation:

Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. Suppose 3.24 g of hydrobromic acid is mixed with 2.3 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.

HBr(aq) + NaOH (S)-----------> NaBr (aq) + H20

mol wt  of HBr = 1 + 79.9  = 80.9

3,24 gm of HBr = 3.24/80.9 = 0.00400moles = 4.00 X 10^-3 moles

mol wt of NaOH =  23.0 + 16.0 +1.01 = 40.0 gm

2.3 gm = 2.3/40.0 = 0.058 moles =5.8 X 10^-2

the reaction of HBr and NaOH is 1:1.  

there are not enough moles of HBr to neutralize all of the NaOH. so

only 4.00X10 ^-3  moles of H2O can be produced

mol weight of H2O is (2 X 1.01) + 16.0 = 18.0

The maximum mass of H2O that can be produced is

18.0 X 4.00X10^-3 = 72.0/1000 =7.20 X 10^-2 gm