Question

calculate the no. of calcium ions obtained from 222gm of calcium chloride dissolved in water.

Answer 1

Answer:

36.132 x 10²³ ions

Explanation:

We know that,

1 mole = 111 g of CaCl₂

Hence,

2 moles = 2 x 111 g of CaCl₂

Therefore,

2 moles = 222 g of CaCl₂

Chemical Equation:

$\boxed{\sf CaCl_{2} \longrightarrow Ca^{2+} + 2Cl^{-}}$

From the equation we can understand that,

1 mole of CaCl₂ gives 3 moles of ions

Hence,

2 moles of CaCl₂ gives = 2 x 3 moles of ions

Therefore,

2 moles of CaCl₂ gives 6 moles of ions

Hence,

⇒ M = 6

According to the question, we are asked to find the number of ions

Therefore,

Number of ions (n) =

$\implies \sf n=M \times Avagadro \ Number$

Here,

Avagadro Number = 6.023 x 10²³

Hence,

$\implies \sf n=6 \times 6.023 \times 10^{23} \ ions$

$\implies \sf n=36.132 \times 10^{23} \ ions$