FREE BACE Preparing solutions Questions and Answers
What is the primary unit of concentration for solutions in a laboratory?
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Wrong!
Molarity (M) is the standard unit of concentration in chemistry, expressing moles of solute per liter of solution.
What is the volume of water needed to prepare a 1 M NaCl solution using 58.44 g of NaCl?
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Wrong!
A 1 M solution means 1 mole of solute (58.44 g of NaCl) is dissolved in 1 liter of water.
Which piece of equipment is most accurate for measuring liquid volumes?
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Wrong!
Pipettes provide precise measurement for transferring small volumes of liquid compared to other lab equipment.
When dissolving a solute in water, what step should be done first?
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Accurately weighing the solute ensures the correct concentration of the final solution.
What does "q.s." mean when preparing a solution?
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"Q.S." stands for quantum satis, meaning to add solvent until the desired final volume is reached.