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x - 5 %
x = 2,5 g
2,5 g - 2,5 %
x - 100 %
x= 100 g
100 g - 50 g = 50 g - należy dodać tylko 50 g wody i nie dodawać soli
5% = ms/50 *100%
ms = 5% * 50g/100%
ms = 2,5g
masa soli to 2,5 g
masa wody 50g - 2,5g = 47.5g
mr2 = 2,5 * 100%/2,5%
mr2 = 100g
100g - 2,5g = 97,5g
97,5-47,5 = należy dodać 50g wody
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