# Chemistry

How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium hydroxide? You'll need to write a chemical reaction, balance it, and then perform your calculation.

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1. Dear Sally,

Here is the balanced equation
HCL(aq) + NAOH(aq)---- NACL(s)+ H20(l)

Number of moles in the NAOH(aq)=
40/(23+16+1)
=1
as 1 mole of HCL will react with 1 mole of the Naoh solution
number of mole of HCL required= 1

Still remember that there is a equation
mol= g/molar mass
Let the number of grams of HCL needed be g grams
the number of grams of HCL required=
1= g/(1+35.5)
g=36.5

Therefore, 36.5 grams of HCL is required
Hope it helps!!

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posted by Barry

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