Which of the following gives the molarity of a 17% (w/w) solution of CH₃COONa in water. The density of the solution is 1.09 gm/ml ?
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Answer:
For quick solving remember the direct formula,
Molarity= (10×density×mass by mass percent)÷(molar mass)
You can easily deduce this.
Plugging in the values
Molarity= (10×1.09×17)÷(12+3+12+16+16+23)
=(10.9×17)÷82= 2.26(roughly)
=> molarity= 2.26 mol/litre
Explanation:
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