Question

which one contain more Na+ ions:0.500 mole of NaBr or 0.0145kg of NaCl?

P.S it is from punjab board Chemistry Chapter 1 exercise.

Answer 1

Explanation:

0.0145×1000g = 14.5g of NaCl

no.of mol of NaCl = 14.5/58.5 = 0.247

so, 0.500 NaBr = 0.500Na+ ions

and 0.24mol NaCl = 0.24mol Na+ ions

Hence, 0.500 mol of NaBr contains more Na+ ions