Question

Question 14 (3 points)If 20g of aluminum is used to replace calcium chloride in a single displacementreaction, how many grams of calcium will be produced? The 20g of aluminum is thelimiting reactant.

Answer 1

The grams of calcium produced will be 44.44 grams

Step-by-step explanation

The equation for the reaction is:

3CaCl₂ + 2Al → 2AlCl₃ + 3Ca

From the equation; 2 mol Al = 3 mol Ca

1 mole of Al = 27 g/mol

1 mole of Ca = 40 g/mol

Therefore, the mass of Ca produced when 20 g of Al react is:

`\begin{gathered} 2mol*27g\text{/}mol\text{ }Al=3mol*40g\text{/}mol\text{ }Ca \\ \\ 20g\text{ }Al=x \\ \\ x=\frac{20g\text{ }Al}{2mol*27g\text{/}mol\text{ }Al}*3mol*40g\text{/}mol\text{ }Ca \\ \\ x=(20g)/(54g)*120g\text{ }Ca \\ \\ x=44.44\text{ }grams\text{ }Ca \end{gathered}`

Thus, the grams of calcium produced will be 44.44 grams