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Answer :
Final answer:
In the 2M KBr solution, you would need 1.5 liters to obtain 3 moles of KBr; for the 1.5M NaCl solution, you would need 10 liters to obtain 15 moles of NaCl; and for the 0.8M Ca(NO3)2 solution, you would need 62.5 milliliters to get 0.05 moles of Ca(NO3)2.
Explanation:
The molarity equation is M = moles / liters. To obtain the required volume in liters, you simply rearrange the equation to liters = moles/M.
- For the 2M KBr solution: liters = 3 moles / 2 M = 1.5 liters of KBr solution.
- For the 1.5M NaCl solution: liters = 15 moles / 1.5 M = 10 liters of NaCl solution.
- For the 0.8 M Ca(NO3)₂ solution: liters = 0.05 moles / 0.8 M = 0.0625 liters. Since 1 liter contains 1000 milliliters, we can convert this value to 62.5 milliliters of Ca(NO3)₂ solution.
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