Ile gramów wody trzeba dodać do 300g 15% roztworu, żeby otrzymać roztwór o stężeniu 10%?
15g subs ---- 100g rr
x ----- 300g
x = 15g*300g/100g = 45g
10g --- 100 g rr
45g ---x
x = 45*100/10g = 450g
450-300 = 150g H2O
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15g subs ---- 100g rr
x ----- 300g
x = 15g*300g/100g = 45g
10g --- 100 g rr
45g ---x
x = 45*100/10g = 450g
450-300 = 150g H2O