Answer to Question #144830 in General Chemistry for Kelechi Agbi

Question

Solutions:
41. Calculate the quantity of grams found in 250 mL of a 15% w/v solution of NaOH.
42. Calculate the quantity of grams found in 475 mL of a 30% w/v solution of KCL.
43. How many mL of a 90% ethyl alcohol solution are needed to prepare 150 mL of a 10% ethyl alcohol solution?
44. Determine the quantity of stock 75% EtOH required to prepare 300 mL of a 25% EtOH solution.
45. Determine the concentration of a solution if 300 mL of a 20% buffer solution was diluted to a final volume of 1000 mL.

Answer 1

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