Presentation is loading. Please wait.

Presentation is loading. Please wait.

Solubility & Saturation. Solubility The solubility of a substance is the amount of that substance that will dissolve in a given amount of solvent. Quantitative.

Similar presentations


Presentation on theme: "Solubility & Saturation. Solubility The solubility of a substance is the amount of that substance that will dissolve in a given amount of solvent. Quantitative."— Presentation transcript:

1 Solubility & Saturation

2 Solubility The solubility of a substance is the amount of that substance that will dissolve in a given amount of solvent. Quantitative – meaning a number will be applied to it. 35.7 grams of NaCl will completely dissolve in 100mL of water at room temperature (20°C) Therefore – the solubility of NaCl = 35.7g/100mL water at 20°C Gases can dissolve in liquid also Oxygen =.0045g/100mL water at 20°C

3 Factors that affect Solubility Temperature – Solubility of solids & liquids increase with increased temperature NaCl = 39.1g/100mL Water at 100°C – Solubility of gases decrease with increased temperature Oxygen =.0033g/100mL Water at 100°C – Gases typically expand greater than Liquids as temperatures increase Pressure – Mainly for Gases: The Solubility of Solids and Liquids are typically not affected by pressure

4 Saturated A saturated solution is one in which the dissolved solute is in equilibrium with the undissolved solute Meaning – no more solute will dissolve 35.7g of NaCl in 100mL of water at 20°C is in equilibrium and therefore – Saturated!

5 Concentration of Solution Defines how much solute is dissolved in a given amount of solvent – typically written as a % The parts of solute per 100 parts of solution Formula: % by mass = mass of solute/mass of solution X 100 Need to know two of three: Mass of the solute in the solution Mass of the solution Percent by Mass

6 Concentration of Solution How many grams of glucose and how many grams of water are in 500g in a 5.3% by mass solution of glucose solution? We know that 5.3% of the solution is glucose, so 500g of Solution X 5.3% ÷ 100 = = 26.5g of glucose 500g – 26.5g = 473.5g of water

7 Concentration of Solution Think of concentration in parts Part refers to ratio 7 parts Solute 9 parts Solvent 16 parts Solution Solute = 7/16 Parts = 43.75% Solvent = 9/16 Parts = 56.25%

8 Concentration of Solution Compare two solutions: Solution A = 15 grams sugar in 300 mL of water Solution B = 25 grams sugar in 300 mL of water Which solution is more concentrated? 15g/300mL X 100 = 5% 25g/300mL X 100 = 8.3% Solution B is more concentrated as is has a higher concentration %


Download ppt "Solubility & Saturation. Solubility The solubility of a substance is the amount of that substance that will dissolve in a given amount of solvent. Quantitative."

Similar presentations


Ads by Google