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3 years ago

How to change 5 % W/V of NaCl to ppm , M ? molar mass = 58.5please clear explain

Chemistry

1 answer:

11Alexandr11 [23.1K]3 years ago

7 0

Answer:

50000ppm and 0.855M.

Explanation:

ppm is an unit of chemistry defined as the ratio between mg of solute (NaCl) and Liters of solution. Molarity, M, is the ratio between moles of NaCl and liters

A 5% (w/v) NaCl contains 5g of NaCl in 100mL of solution.

To solve the ppm of this solution we need to find the mg of NaCl and the L of solution:

mg NaCl:

5g * (1000mg / 1g) = 5000mg

L Solution:

100mL * (1L / 1000mL) = 0.100L

ppm:

5000mg / 0.100L = 50000ppm

To find molarity we need to obtain the moles of NaCl in 5g using its molar mass:

5g * (1mol / 58.5g) = 0.0855moles NaCl

Molarity:

0.0855mol NaCl / 0.100L = 0.855M

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Explanation:

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Volume displaced = 0.002346 m³

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Where

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V is the volume displaced

The free body diagram of the sphere is shown in image.

According to image:

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Applying in the equation to find the density of the liquid as:

$6.1\times 9.81=\rho\times 9.81\times 0.002346+26$

$33.841=\rho\times 9.81\times 0.002346$

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3 years ago

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2 years ago

How to change 5 % W/V of NaCl to ppm , M ? molar mass = 58.5please clear explain​

How to change 5 % W/V of NaCl to ppm , M ? molar mass = 58.5please clear explain