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1,143g roztworu kwasu ------ 1cm3
x g roztworu kwasu ----------- 100cm3
x = 114,3g roztworu kwasu
w 100g roztworu ------- 20g kwasu
w 114,3g roztworu --------x
x = 22,86g kwasu
Masa H2SO4 = 98g/mol
Masa NaOH = 40g/mol
wg reakcji:
98g H2SO4 ------- 2*40g NaOH
22,86g H2SO4 ------ x
x = 18,66g NaOH
ODP: Należy użyć 18,66g NaOH