A photographic "stop bath" contains 160ml of pure acetic acid, HC2H3O2(1) in 650 ml solution
volume of acetic acid = 160ml
volume of solution = 650ml
ratio of acetic acid to solution = "\\dfrac{160}{650}" = 0.246
"\\therefore" There are 246 parts of acetic acid per 1000 parts of the solution"."
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