Lab #8 Solutions Chemistry 108 Instructor: Kristine Cooper.

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Presentation transcript:

Lab #8 Solutions Chemistry 108 Instructor: Kristine Cooper

Mixture A substance containing two or more substances mixed together. Homogenous mixtures are uniform in compositions. Heterogenous mixtures are not uniform in composition.

Saturated vs. Unsaturated In a saturated solution, the solvent contains the maximum amount of solute. Conversely, unsaturated solutions do not contain the maximum amount of solute the solution can hold.

% by Weight (mass) How many grams of sugar are in 500g of a 10% sugar solution?

% by Volume A solution is made by mixing 10mL of alcohol in with 50mL of water. What is the % by volume of the alcohol?

Molarity (M) MOLES PER LITER What is the molarity of a solution obtained by dissolving 35g of KOH in enough water to prepare 2L of solution?

Molality (m) MOLES PER KILOGRAM If 8.50g of KBR is combined with 500g of water to form a solution, what is the molality of the solution?

Today in Lab PART ONE – Physical state observations PART TWO – Preparation of a solution my molarity PART THREE – Purification PART FOUR – Stability vs. Temperature