A run has prepared 0.1% solution of sodium chloride in water . Which of the following correctly represent the composition of solution .
✳1g of NaCL + 100g of water
✳0.11g of Sodium chloride + 100g of water
✳0.1g of sodium chloride with 99.99g of water
✳0.10g of NaCL with 99.90g of water
Also calculate % in each composition

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Solution

Dear user,
3)0.1g of sodium chloride+99.99g of water
mass % of solute= $\frac{mass of solute}{mass of solution} \times 100$
$= \frac{0.1}{100} \times 100 = 0.1 %$
mass % of solvent=
$\frac{mass of solvent}{mass of solution} \times 100$
$= \frac{99.99}{100} \times 100 = 99.99 %$

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Q. Question 41
Arun has prepared 0.01% (by mass) solution of sodium chloride in water. Which of the following correctly represents the composition of the solutions?
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(b) 0.11 g of NaCI + 100 g of water
(c) 0.01 g of NaCI + 99.99 g of water
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Dear user, 3)0.1g of sodium chloride+99.99g of water mass % of solute=mass of solutemass of solution×100 =0.1100×100=0.1% mass % of solvent= mass of solventmass of solution×100 =99.99100×100=99.99%

Dear user,
3)0.1g of sodium chloride+99.99g of water
mass % of solute= $\frac{mass of solute}{mass of solution} \times 100$
$= \frac{0.1}{100} \times 100 = 0.1 %$
mass % of solvent=
$\frac{mass of solvent}{mass of solution} \times 100$
$= \frac{99.99}{100} \times 100 = 99.99 %$