Concentration of solution
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A saturated solution contains as much solute as can dissolve at a given temperature, an unsaturated solution contains less, and a super-saturated solution contains more. The maximum amount of solute that can dissolve in a specified amount of solvent at a set temperature is known as the solute's solubility in that solvent at that temperature. Solubility is expressed as the amount of solute that dissolves in 100 grams of solvent. The concentration of a solution refers to the amount of solute present in a given quantity of the solution and can be expressed as a percentage by mass or volume.
Concentration of solution
- 1. Saturated solution:- A solution, which at a given temperature dissolves as much solute as it is capable of dissolving is said to be a saturated solution. Unsaturated solution:- When the amount of solute contained in a solution is less than the saturation level, the solution is said to be an unsaturated solution. Super-saturated solution:-A solution which contains more of the solute than required to make a saturated solution is called a super- saturated solution.
- 2. The maximum amount of a solute which can be dissolved in 100gms of a solvent at a specified temperature is known as the solubility of that solute in that solvent at that temperature. While expressing the solubility of a substance , we have to specify the temperature also.
- 3. Problem on solubility:- 12gms of potassium sulphate dissolves in 75gms of water at 600C. What is its solubility in water at that temperature. Amount of solute X 100 Solubility = Amount of solvent = 12 x100 75 = 16gms
- 4. Concentration of a solution It is defined as the amount of solute in a given quantity of the solution .it is expressed in percentage of solute in the solvent . Concentration of solution in terms of mass of solute : Concentration of solution = mass of solute in grams x 100 mass of solution in grams Concentration of solution in terms of volume of solute : Concentration of solution = volume of solute in ml x 100 volume of solution in ml
- 5. Concentration of a solution •A solution is made by dissolving 25g of sugar in 175g of water. Calculate the concentration of sugar solution. •A solution is made by dissolving 50g of potassium nitrate in 250 g of water. Calculate the concentration of potassium nitrate solution. •How much water should be added to 50g of glucose, so as to obtain 12% glucose solution? •How much water should be added to 80g of common salt, so as to obtain 20% salt solution?
- 6. •A solution contains 50ml of acetic acid and 250ml of water. Calculate the percentage (by volume) of acetic acid. •Calculate the mass by volume percentage of copper sulphate if 20g of copper sulphate is present in 250ml of solution. •A solution contains 30g of glucose and 20g of sugar in 500ml of water. Calculate the mass percent of glucose and sugar.( density of water= 1g/ml) •During an experiment the students were asked to prepare a 10% solution of sugar in water. Ramesh dissolved 10g in 100g of water while Sarika prepared by dissolving 10g of sugar in water to make 100g of solution •Are the two solution of the same concentration •Compare the mass % concentration of the two solution.