Question

How many sodium ions in 2.00 mol of NaCl

Answer 1

1 mole of nacl has 1 mole of na ions
therefore 2 moles of nacl has 2 moles of na ions
Mole x L
= 2x6.02x10^23
=12.04 x 10^23

Answer 2

1.20 x 10^24

Step-by-step explanation:

This question seeks to test the understanding of mole concept where the number of particles (ions, atoms or subatomic particles) in one mole of any substance is equal to avogadro's number (6.02 x 10^23).

1 mole of NaCl will dissociate in a solution as follow

NaCl →Na+ + Cl-

Hence, 2 moles of NaCl will dissociate as follow

2NaCl → 2Na+ + Cl-

From the above, 2 moles of NaCl will dissociate to give 2 moles of sodium ion (Na+)

The number particles present in 2 moles of Na+ is

2 x 6.02 x 10^23 = 1.2 x 10^24