Dilutions (w/v) really need help with this!?
In order to prepare for this lab exercise one would be required to prepare 1.0 % (w/v) NaCl. Based on this lab exercise answer the questions below based on the diluents. a) How much diluent would an individual student require to complete this lab? Support the answer with relevant calculations.
b) One was instructed to prepare enough diluent for a class of 24 students. In determining the total amount of diluent needed each student would typically require slightly more volume. Assume that each student will take 25 % additional volume. Calculate the amount of diluent needed for a class of 24 students. Show using a labeled diagram how one would prepare the diluent.
can anyone help me with either one or both questions please!
Answers
1% w/v means 1 g of solute dissolved in a final volume of 100 mL of solution. NaCl dissolves readily in water so presumably de-ionised water would be an appropriate diluent. Unfortunately there's no information in the question to indicate how much solution a student will need for the lab exercise, except that whatever it is, a student will need 25% more.
17 October 2012
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17 October 2012
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