Question

QUESTION 7 Select the correct procedure for creating a dilute solution from a stock solution None of these O Place the solvent in the glassware and then add an aliquot of the stock solution to fill to the mark O Place an aliquot of the stock solution in the glassware and then fill to the mark with the necessary solvent. QUESTIONS Determine how many milliliters of a solution that is 1.00 x 10 Min copper ions is required to make a 50 milliliters of a solution that is 1.00 x 102 M. Remember to watch significant figures, round only at the end of your calculation, use decimal notation, and do not include units in your answer. QUESTIONS In this experiment, a set of five solutions is prepared with each solution containing a known concentration of copper ion. Using a spectrophotometer, the absorbance for each of these five solutions is the measured and recorded. What is the purpose of making these five solutions and recording their corresponding absorbances? Spectrophotometers are designed to specifically work with solutions in sets of five other combinations will not be recognized by the instrument. To create a standard curve so that other solutions of copper ion (unknown concentration) can be compared to it Copper is an element in the fifth row of the periodic table. Making five solutions is a safeguard in case a student accidentally spills one, they can still complete the experiment.

Answer 1

FEBRUARY 2013 MARCH M T W T F S S M T W T F S S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 saveturday 02 5th Week .033-332 Saturday 000 and Place an alignal of the stock solution in the glassware. then fill to the mark with the necessary solven 10.00 8) NM, V2 M2 >> V x 1x10 = 50x4x102 11.00 12.00 >) Vi = 504102 1x10-1 = Ve = 550 x 1o 25 mL 01.00 100 le 02.009) © To Create a standard curre so that other solutions of eupper lon (unknown concentration) ear be.compared to it. 03.00 04.00 05.00