Question

calculati concentrati procentuala a unei solutii care se obtine din 220 g sare de lamaie de puritate 96% si 1,4 kg apa​

Answer 1

Răspuns:

c=mdx100/ms,  unde ms= md+m,apa

m,impur= 220g

p= 96%

m,apa= 1400g

p= m,purx100/m,impur---> m,pu= 220x96/100g=211,2g sare=md

ms=md+m,apa= 211,2g+1400g=1611,2 g

c= 211,2x100/1611,2=13%

Explicație: