1.500 M HCl 25.00 mL NH3 1.73 mL 42.36 mL

A titration is done to determine the concentration

of in a certain sample of household ammonia solution.

The concentration of the HCl solution used is 1.500 M,

the volume of HCl solution is 25.00 mL,

the initial buret reading for the solution is 1.73 mL,

and the final buret reading is 42.36 mL.

Calculate the molarity of the base.

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산-염기 반응식

HCl + NH3 → NH4Cl

NH3 소비 mL

= 42.36 – 1.73

= 40.63 mL

M1V1 = M2V2

산의 mol수 = 염기의 mol수

M2 = M1V1 / V2

= (1.500 M) (25.00 mL) / (40.63 mL)

= 0.922963 M

답: 0.9230 M

[키워드] HCl + NH3 적정 기준