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Question 6: What is the first thing to do after putting a weighing boat on the balance? Question 7: If you have excess reagent on the weighing boat, what should you avoid doing and why? Question 8: If you had the choice between a 1 liter beaker and a 1 liter graduated cylinder, which one should you use to measure volumes with maximal precision when making 1 liter of PBS? (you can perform an internet search to find this if you are not sure of the answer) Question 9: What should be done before measuring an unknown pH of a solution using a pH meter?
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