Question

How many moles of Nations are present in 20 mL of 0.4 M Na3PO, solution?
Options
0.08
0.12
0.024
0.05
​

Answer 1

Answer:

1 molecule of Na

3

PO

4

dissociates to give 3 sodium ions.

The number of moles of Na

+

ions present in 20 mL of 0.40 M Na

3

PO

4

=

1000

20

×0.40×3=0.024.

Thus, 0.024 mol of Na

+

ions are present in 20 mL of 0.40 M Na

3

PO

4