A Ni^2+ solution was prepared by dissolving 300.1g of NiCl2.6H2O in 1dm^3 of distilled water. The Ni^2+ concentration of the solution was found to be 1moldm^-3. Calculate the purity of the solution.

Md Ariful Islam

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The solution is 74.7% pure.

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A saturated solution of potassium chloride is prepared by dissolving 45 g KCl in 100.0 g water at 60 °C. a. What is the concentration of this solution?

Concentration = Mass of the solute/Mass of the solution= 45/145 = 0.310.31*60 = 18.6g/mol

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Calculate the percentage concentration by mass of a solution prepared by dissolving 2.32 g of calcium chloride in 81.0 g of water.

2.32 g solute (2.32+81.0) g solution ×100=2.78%

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WHAT IS THE MOLARITY OF A SOLUTION MADE BY DISSOLVING 2.51GRAMS OF SODIUM CARBONATE IN DISTILLED WATER AND MAKING IT UP TO 100ML WITH DISTILLED WATER IN A VOLUMETRIC FLASK

Moles =mass ÷molar massMass =2.51gMolar mass =106Moles = 0.0156875

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An isotonic saline solution was prepared by dissolving 0.92 g of NaCI in enough distilled water to make 100 ml solution. What is the percent by mass/volume of the solution?

100-0.92= 99.0899.08/100×100= 99.08%

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An isotonic saline solution was prepared by dissolving 0.92g of NaClin 2 points enough distilled water to make 100ml solution. What is the percent by mass/volume of the solution?

Molecular weight of isotonic saline = 58.50.92×58.5 = 53.8253.92/100×100= 53.92%

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A solution is prepared by dissolving 19.2 g of glucose in 205 g of water. The final volume of the solution is 214 ml. Find the concentration of the solution in units of molality.

250 ml × 0.4 = 100ml= 100/2 = 50mlMolar mass of sodium hydrogen carbonate = 84.007Molarity = 111/84.007 = 1.32 mol1.32/20= 0.066mol/L

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Based on the colours produced in your purity test, explain the test and what is your conclusion about the relative purity of recrystallized aspirin sample supplied and commercially available aspirin?

The physical properties of a substance can be used to establish its purity. These properties include the melting point and boiling point. Different substances tend to have different melting and...

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1. Determine the molarity of a solution containing 10.6g of sodium carbonate dissolve in a)250cm³ of distilled water b)500cm³ of distilled water

Solution:Molarity or molar concentration is the number of moles of solute per liter of solution, which can be calculated using the following equation:Molarity = mol solute / L of solution.Molar mass of sodium...

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What is the molarity of a solution made by dissolving 2.00 g of sodium carbonate in distilled water and making it up to 250 mL with distilled water in a volumetric flask?

250 ml=0,25 LC=n/V;n=m/M;n(Na2CO3)=2/106=0,02 molC(Na2CO3)=0,02/0,25=0,08 mol/L

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Calculate the concentration of hydrated copper sulfate, CuSO4.5H2O in a solution originally prepared by dissolving 0.10g of the solid in water and making up to 50cm3 with water?

MOLAR MASS OF CUSO4.5H2O = 249.5 gm /mol ..given mass of CUSO4.5H2O = 0.10 g .So , moles of CUSO4.5H2O =( 0.10 / 249.5 ) mole .volume of water =...

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