Question

prepare 150ml de cloreto de sodio com concentracao de 25g/l

Answer 1

prepare 150ml de cloreto de sodio com concentracao de 25g/l

150 ml ÷ 1000 = 0,15 L

_____________________

$C =\dfrac{m1}{v} \\\\\\ 25 =\dfrac{m1}{0,15} \\\\\\ m1 = 0,15\cdot25 \\\\\\ m1 = 3,75~~g$

Resposta : 3,75 g