Answer Happy

Report your answer to 3 significant figures in
scientific notation (example: 1.23E+4) unless stated otherwise. DO
NOT include the units in your answer.



1. Answer the following questions based on an aqueous 2.76 M
potassium thiosulfate stock solution.



(a) If 23.6 mL of the stock solution are diluted to 433 mL, what is
the molarity (in mol/L) of the new solution?

------------M
(b) If 19.2 mL of the stock solution are diluted to obtain a 0.648
M potassium thiosulfate solution, what is the volume (in mL) of the
new solution?

--------- mL
(c) Determine the volume (in mL) of the original stock solution
that must be used to prepare 485 mL of a 0.397 M potassium
thiosulfate solution.

-----------mL
(d) Determine the volume of water (in mL) that was added to 28.9 mL
of the stock solution to prepare a 0.519 M potassium thiosulfate
solution.

----------mL
(e) Determine the concentration (in M) of potassium ions in a
solution prepared by adding 134 mL of water to 19.0 mL of the stock
solution of potassium thiosulfate solution.

--------- M