Chemistry - Concentration Terms Question with Solution | TestHub

(A) 1000 mL solution contains 400 gm MgO.

1200 gm solution contains 400 gm MgO.

$W_{solvent}=800gm$

(B) 100 mL contains 40 gm NaOH.

160 gm contains 40 gm NaOH.

$W_{solvent}=120gm$

(C) 1000 gm solvent contains 800 gm CaCO₃.

(D) $W_{solute}=0.6\times 20=12gm$, $W_B=0.4\times 25=10gm$