Question

how many Moles of Na+ ions are in 20ml of 0.40M Na3PO4

Answer 1

One molecule of Na3PO4contains 3 ions of Na+.

Molarity=no.of moles/Volume in l

⇒n=M×l=0.40M×0.02l=0.008moles

So total moles of Na+ = 0.008×3=0.024moles(answer)

Answer 2

0.024 moles of ions is the best answer.

Explanation:

• 1 molecule of Na₃PO₄ dissociates to provide the three sodium ions.
• The wide variety of the moles of Na⁺  ions found in the 20 mL of 0.40M Na₃​PO₄ = 20/1000 × 0.40×3 = 0.024.

​Therefore, 0.024 mol of Na⁺ ions are found in the 20 mL of 0.40M Na₃​PO₄ solution.

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