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Solving Basic Molarity Problems

Solving Basic Molarity Problems. S.I. Videos for Biology 1441 By Eliel Arrey www.elielarrey.com. MOLARITY IS CONCENTRATION MOLARITY = MOLS / LITRE. A 16 g of Oxygen is dissolved in 2L of water. What is the Molarity of the final solution?. 16g O, Molar mass of O = 16g/1mol. 16g/mol

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Solving Basic Molarity Problems

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  1. Solving Basic Molarity Problems S.I. Videos for Biology 1441 By Eliel Arrey www.elielarrey.com

  2. MOLARITY IS CONCENTRATION MOLARITY = MOLS / LITRE A 16 g of Oxygen is dissolved in 2L of water. What is the Molarity of the final solution? 16g O, Molar mass of O = 16g/1mol. 16g/mol 1 mol of Oxygen, dissolve in 2L of H2O. M = 1molO/2L = 0.5 M, solution 0.5mols of Oxygen for every 1 L of water.

  3. MOLARITY IS CONCENTRATION MOLARITY = MOLS / LITRE A 12 g of Mg is dissolved in 250 mL of water. What is the Molarity of the final solution? Always pay attention Units: Molarity is measured in Mols/Litre Molar mass of Mg: 24g/mol. ??? 24g for every 1mol. 12g x 1mol/24g = 0.5 or ½ mol of Mg. 250mL x 1L/1000mL = 0.250L Molarity = 0.5 mols Mg/ 0.250L = 2M solution.

  4. MOLARITY IS CONCENTRATION MOLARITY = MOLS / LITRE A 6 g of Sucrose is dissolved in 350 mL of water. What is the Molarity of the final solution? (Formula for sucrose is C12H22O11) Molar mass of Sucrose?? MW= (12 * C) + (22 * H) + (11 * O) = MW = C12H22O11 = (12)(12) + (1)(22) + (16)(11)C12H22O11 = 144 + 22+ 176 MW = 342g/mol 6g x 1mol/342g = 0.0175 mols 350ml x 1L/ 1000mL = 0.350L Molarity = 0.0175mol/0.350L = 0.0501M

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