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Sagot :
Answer:
mass of NaCl: 5.0436 g
Explanation:
- balanced equation: FeCl₃+3NaOH -> Fe(OH)₃ + 3NaCl
Given:
- 4.67g of FeCl₃
- FeCl₃ molar mass is 162.5 g
solve for moles of FeCl₃
moles = mass/mr
moles = 4.67/162.5
moles = 0.0287
solve for moles of NaCl using molar ratio
FeCl₃ : 3NaCl
1 : 3
0.0288 : 0.0862
Then find mass:
- molar mass of NaCl is 58.5
mass = moles * Mr
mass = 0.0862 * 58.5
mass = 5.0436 g
- 1mol of FeCl_3 produces 3mols of NaCl.
Moles of FeCl3
[tex]\\ \rm\hookrightarrow \dfrac{4.67}{162.5}=0.03mol[/tex]
Now
- moles of NaCl=0.03(3)=0.09mol
Mass of NaCl
- 0.09(58.5)=5.265g
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