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3 years ago

12

How many chloride ions are in a 220 grams of calcium chloride?

2 answers:

fomenos3 years ago

6 0

The Ions present in CaCl₂ are,

Ca²⁺ Cl⁻ Cl⁻

Means 1 formula unit contains 1 Ca²⁺ ion and 2 Cl⁻ ions.

Also, 1 mole of CaCl₂ contains 6.022 × 10²³ formula units.

So, 1 mole formula units of CaCl₂ contain,

2 × 6.022 × 10²³ = 1.20 × 10²⁴ Cl⁻ Ions

Now, Calculating number of moles contained by 220 g of CaCl₂,
As,
110.98 g of CaCl₂ = 1 mole
Then,
220 g of CaCl₂ = X moles
Solving for X,
X = (220 g × 1 mol) ÷ 110.98 g

X = 1.98 moles
As,
1 mole contained = 1.20 × 10²⁴ Cl⁻ Ions
Then,
1.98 mole will contain = X Cl⁻ Ions
Solving for X,
X = (1.98 mol × 1.20 × 10²⁴ Ions) ÷ 1mol

X = 2.38 × 10²⁴ Cl⁻ Ions

AURORKA [14]3 years ago

3 0

Answer:

10.24 x 10^24 ions. i just took the test. have a great day

Explanation:

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