Analytical Chemistry: Solution Concentration Expressions
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Questions and Answers

What is the first step in finding the molar concentration of a solute in a solution using dilution rule?

  • Measure the mass of the solute (correct)
  • Calculate the molar mass of the solute
  • Measure the volume of the solution
  • Calculate the final molar concentration

In problem 3, what is the molar mass of NaBr?

  • 22.99 g/mol
  • 58.44 g/mol (correct)
  • 102.89 g/mol
  • 50 g/mol

What is the correct method for preparing 0.18 M CaSO4 in 100 mL?

  • Calculate the molar concentration of the stock solution and dilute it to obtain 0.18 M in 100 mL (correct)
  • Add 0.18 moles of CaSO4 to 100 mL of water
  • Add 18 grams of CaSO4 to 100 mL of water
  • Dissolve 0.18 grams of CaSO4 in 100 mL of water

How much volume (in mL) of the solution is requested to dissolve 3 grams of LiOH to prepare 0.25 M?

<p>125 mL (B)</p> Signup and view all the answers

What is the definition of 'specific grav.Write' on the bottle mentioned in problem 1?

<p>Specific gravity at Write temperature (C)</p> Signup and view all the answers

Problem 1 is about calculating the molar concentration of ethanol in an aqueous solution

<p>True (A)</p> Signup and view all the answers

Problem 2 is about preparing 2.00 L of 0.108 M BaCl2 from BaCl2 2H2O

<p>True (A)</p> Signup and view all the answers

Problem 3 involves preparing 0.5 M NaBr in 500 mL distilled water

<p>True (A)</p> Signup and view all the answers

Problem 4 is about preparing 0.18 M CaSO4 in 100 mL

<p>True (A)</p> Signup and view all the answers

Problem 5 involves finding the volume of the solution requested to dissolve 3 grams of LiOH to prepare 0.25 M

<p>True (A)</p> Signup and view all the answers

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