A 0.005mol of potassium chloride solution contains 750g of water . What is the molality of that solution

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Ответ:

noahwaitsowl357

28.09.2020

Chemistry

The trial that had the greatest percent error is trial-3.

Explanation:

Percentage error:

$\% error=\frac{|Theoretical-Experimental|}{Theoretical}\times 100$

Trail-1

Experimental value of density of silver= 10.6 g/cm^3

Theoretical value of density of silver= 10.5 g/cm^

Percentage error is trail -1:

$\% error=\frac{|10.5 g/cm^3-10.6 g/cm^3|}{10.5 g/cm^3}\times 100=0.95\%$

Trail-2

Experimental value of density of silver= 10.8 g/cm^3

Theoretical value of density of silver= 10.5 g/cm^

Percentage error is trail -2:

$\% error=\frac{|10.5 g/cm^3-10.8 g/cm^3|}{10.5 g/cm^3}\times 100=2.85\%$ .

Trail-3

Experimental value of density of silver= 9.6 g/cm^3

Theoretical value of density of silver= 10.5 g/cm^

Percentage error is trail -1:

$\% error=\frac{|10.5 g/cm^3-9.6 g/cm^3|}{10.5 g/cm^3}\times 100=8.57\%$

The trial that had the greatest percent error is trial-3.

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A 0.005mol of potassium chloride solution contains 750g of water . What is the molality of that solution