Question

qse 1 retest 25 - 26
ca(oh)₂ + h₂so₄ → caso₄ + 2h₂o
74 g ? 136 g 36 g
what is the mass of h₂so₄? g

Explanation:

Step1: Apply law of conservation of mass

According to the law of conservation of mass, the total mass of reactants equals the total mass of products in a chemical reaction. Let the mass of $H_2SO_4$ be $x$ grams.

Step2: Set up mass - equality equation

The mass of $Ca(OH)_2$ is 74 g, and the masses of products $CaSO_4$ and $H_2O$ are 136 g and 36 g respectively. So, $74 + x=136 + 36$.

Step3: Solve for $x$

$x=(136 + 36)-74$.
$x = 98$.

Answer:

98