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0.55 grams of solid calcium chloride, cacl2, is dissolved in 250 ml of water to make a cacl2 solution. what is the ph of the solution ? (round off the atomic masses to one decimal place for calculations)



Answer :

When 0.55 grams of solid calcium chloride, is dissolved in 250 ml of water, the pH of the solution is 1.7.

given that :

mass of sodium chloride , CaCl₂ = 0.55 g

volume = 250 ml = 0.25 L

moles of sodium chloride = mass / molar mass

                                           = 0.55 / 111

                                            = 0.00495 mol

the molarity expression is given as :

Molarity = moles / volume in L

               = 0.00495 / 0.25

               = 0.0198 M

pH = - log (0.0198 )

     = 1.7

The pH of the solution which contains the 0.55 g of sodium chloride in the water of 250 ml is 1.7.

To learn more about pH here

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