Question

completely with units and show your work for full credit. Complete on this sheet or on a separate piece of paper, but do not complete in your lab notehook For each question, clearly indicate the name and the amount of EACH solute AND the amount of solvent (using proper units gms or mls, unless otherwise indicated) that you would use to prepare the solution. Assume water is the solvent if not indicated. 2 pts will be earned for showing your work, using correct labels and units, and including solvent amount for each question work Using the molarity formula: You are asked to prepare a sucrose solution for a future experiment. In the cabinet, there is a bottle of sucrose crystals (solid; mw-342g/mol) and distilled water. The instructions state that you need to make 250mls of 0.5M sucrose solution. 1. How much sucrose from the cabinet and how much water should you add to make this solution? 1 pt. 2. How many moles of sucrose are contained within just 50mls of the solution produced in Question 1? 0.5 pts Next, you need to prepare a sodium chloride solution. There is a bottle of NaCI (solid; mw-58g/mol) in the cabinet. Your recipe states you need to make 500mls of 0.5M sodium chloride. 3. How much sodium chloride from the cabinet and how much water should you add to make this solution? 1 pt. Using the % solution formula: You are asked to prepare TBS buffer and see that there is a bottle of TBS buffer (pure) in the cabinet. Your protocol states that you need 200mls of a 25% TBS solution. 4. How much TBS from the cabinet should you use to generate this solution? 1 pt.

Answer 1

You just have to remember the formula of Molarity which i have written in the first pic and you have to know what each symbol indicate.

Now just put the values in formula and get answer.

1 W1000 01-solution ollowng dala qiven V 250 ml e Volumeofsoluton as eque volume of sovee watked can to nswer 42 sneide dod 20 is nee

Molarn will remain YYes 0 SOMolar ut this Valve on ryolaxi y equati x-1000 025 the5o m Solution sO 025

Mol anity =0。5M = 500ml S at the valesmmela Mh on ×10.00 60 0.5 5 g t-Hao-needed is = 500-ml
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