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How many total moles of ions are released when each of the
Chapter 4, Problem 12P(choose chapter or problem)
How many total moles of ions are released when each of the following samples dissolves completely in water?
(a) 0.75 mol of \(\mathrm{K}_{3} \mathrm{PO}_{4}\)
(b) 6.88 \(\times10^{-3}\) g of \(\mathrm{NiBr}_{2} \cdot 3 \mathrm{H}_{2} \mathrm{O}\)
(c) 2.23 \(\times10^{22}\) formula units of \(\mathrm{FeCl}_{3}\)
Questions & Answers
QUESTION:
How many total moles of ions are released when each of the following samples dissolves completely in water?
(a) 0.75 mol of \(\mathrm{K}_{3} \mathrm{PO}_{4}\)
(b) 6.88 \(\times10^{-3}\) g of \(\mathrm{NiBr}_{2} \cdot 3 \mathrm{H}_{2} \mathrm{O}\)
(c) 2.23 \(\times10^{22}\) formula units of \(\mathrm{FeCl}_{3}\)
ANSWER:
Step 1 of 3
Here we have to calculate how many total moles of ions are released when each of the following samples dissolves completely in water.
(a) 0.75 mol of
1st we will write a chemical equation for the dissociation of .
From the above reaction it has been found that 4 moles of ions are released when one mole of dissolves,so the total number of moles released can be calculated as,
0.75 mol
4 mol ions / mol
= 3 mol of ions
Thus 3 moles of ions are released when samples dissolves completely in water.