Worksheet 6.4 Solution Calculations

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Palmetto High School *

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1046

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Chemistry

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Nov 24, 2024

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pdf

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Uploaded by SuperViperMaster316

CHM1046 RVD: 6.1 Solution Calculations Name:________________________ 9.12.2022 Now let’s practice making solutions and diluting solutions. 1. How many grams of sucrose (C 12 H 22 O 11 ) are required to make 50mL of a 1M solution? (Remember that M is molarity which is moles of solute/L of solution) 2. A student makes the solution in the lab by measuring 50.0 mL of water in a graduated cylinder followed by adding the mass of the sucrose from Question 1 to a beaker of water. The student then mixed the solution well and to their utter shock, the volume of the solution is now 60.7 mL. Explain what happened and where the student went wrong in trying to make 50.0 mL of the 1M solution. Describe the steps the student should have taken to prepare a 50.0 mL solution of 1M sucrose. Use the aid of a diagram of a volumetric flask to write out the instructions. (What equipment would you need in the lab and what would you do with it? – write a procedure)

CHM1046 RVD: 6.1 Solution Calculations Name:________________________ 9.12.2022 3. Explain in words the process of how the student can then make a 0.5 M sucrose solution from the 50.0 mL 1M solution above. 4. Using the image below for the concentrated 1M solution, what would you expect the 0.5M diluted solution to look like (ignore drawing the water molecules). Concentrated: Diluted:

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Part 3: Solution Stoichiometry (section 9.4) 1. A 10.0 mL sample of an unknown H3PO4 solution requires 112 mL of 0.100 M KOH to completely react with the H3PO.. What is the molarity (M) of the unknown H&PO solution? (Identify 'given' and 'needed quantities and set up a plan to solve the problem). НаРОд (аq) + ЗКОН (аq) KЗРОa (аq) + 3Н20 (1)

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