Question 38
Compute the number of ions present in 5.85 g of sodium chloride.
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Solution
Molar mass of NaCl = 23 + 35.5 = 58.5 g
Each NaCI particle is equivalent to one Na+ one Cl−
Number of ions = 2
Number of ions in 5.85 g of NaCl=2×6.022×1023×5.8558.5=1.2042×1023 ions