Molarity MOLARITY Concentration : comparison of solute to solvent ( solute solvent) – Concentrated large ratio of solute to solvent – Dilute small ratio of solute to solvent – Molarity – Symbol M mass – Equation in reference table M = moles of solute M = molar mass – L of solution L of solution Example Problems 1. What is the molarity of a solution formed 2. To prepare 10.5 L of a 2.50 M solution of by mixing 10.0 g of H2SO4 with enough KOH, how many grams of potassium water to make 0.100 L of solution? hydroxide must be used? 3. How many moles of LiBr must be added to 4. What is the molarity of the solution .650 L of water to make a 2.0 M solution? produced when 145 g of NaCl is dissolved in sufficient water to prepare 2.75 L of solution? 5. How many grams of KCl are needed to 6. What is the molarity of the solution prepare 0.750 L of a 1.50 M solution? produced when .594 mol of HCl is dissolved in 0.385 L of water? 7. To produce 3.00 L of a 1.90 M solution of 8. If 8.77 g of KI are dissolved in enough sodium hydroxide, how many grams of NaOH water to make 4.75 L of solution, what is the must be dissolved? molarity of the solution? Label the diagram below to demonstrate the dissociation of the water molecule and then relate this diagram to the term pH. What defines an acid and a base? Why are small changes in pH so important in biology? What is a buffer? Give an example on how they would work in a living organism. What is acid precipitation and why is it important to living organisms? Chapter 4: Cell Structure What are three features all cells have in common? How do prokaryotic and eukaryotic cells differ?
Molarity MOLARITY Concentration – comparison of solute to solvent ( solute : solvent) Concentrated – large ratio of solute to solvent Dilute – small ratio of solute to solvent Molarity – Symbol – M mass Equation – in reference table M = moles of solute M = molar mass L of solution L of solution Example Problems 1. What is the molarity of a solution formed by mixing 10.0 g of H2SO4 with enough water to make 0.100 L of solution? 2. To prepare 10.5 L of a 2.50 M solution of KOH, how many grams of potassium hydroxide must be used? 3. How many moles of LiBr must be added to .650 L of water to make a 2.0 M solution? 4. What is the molarity of the solution produced when 145 g of NaCl is dissolved in sufficient water to prepare 2.75 L of solution? 5. How many grams of KCl are needed to prepare 0.750 L of a 1.50 M solution? 6. What is the molarity of the solution produced when .594 mol of HCl is dissolved in 0.385 L of water? 7. To produce 3.00 L of a 1.90 M solution of sodium hydroxide, how many grams of NaOH must be dissolved? 8. If 8.77 g of KI are dissolved in enough water to make 4.75 L of solution, what is the molarity of the solution? Label the diagram below to demonstrate the dissociation of the water molecule and then relate this diagram to the term pH. What defines an acid and a base? Why are small changes in pH so important in biology? What is a buffer? Give an example on how they would work in a living organism. What is acid precipitation and why is it important to living organisms? Chapter 4: Cell Structure What are three features all cells have in common? How do prokaryotic and eukaryotic cells differ?
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