Molarity and Solution Preparation

This video tutorial by ChemTutor covers how to solve molarity questions using dimensional analysis. It begins with an introduction to molarity, including its definition and units. The video then provides four examples: calculating moles of HCl in a solution, finding the volume of NaCl solution in milliliters, determining the mass of NaOH needed for a solution, and calculating the volume of a vitamin C solution. Each example demonstrates the application of dimensional analysis to solve molarity problems.

What is the primary focus of this video tutorial?

• Balancing chemical equations

• Understanding molarity and dimensional analysis

• Learning about chemical reactions

• Studying atomic structure

Which of the following is equivalent to 1 molar?

• 1 mole per liter

• 1 mole per cubic meter

• 1 mole per milliliter

• 1 mole per gram

How many moles of HCl are in 0.250 liters of a 1.50 molar solution?

• 0.150 moles

• 0.250 moles

• 0.500 moles

• 0.375 moles

What is the concentration of a solution if it contains 0.750 moles of solute per liter?

• 1.000 molar

• 0.500 molar

• 1.500 molar

• 0.750 molar

How many milliliters of a 0.750 molar NaCl solution are needed to contain 0.500 moles of NaCl?

• 1000 ml

• 500 ml

• 667 ml

• 750 ml

What is the first step in preparing a 100 ml solution of NaOH?

• Measure the mass of NaOH

• Convert ml to liters

• Determine the concentration

• Calculate the molar mass of NaOH

What is the molar mass of NaOH used in the calculation?

• 22.99 grams per mole

• 18.015 grams per mole

• 58.44 grams per mole

• 39.998 grams per mole

How many grams of NaOH are needed to prepare a 0.600 molar solution in 100 ml?

• 2.0 grams

• 1.8 grams

• 3.0 grams

• 2.4 grams

What is the molar mass of vitamin C used in the calculation?

• 200.204 grams per mole

• 180.156 grams per mole

• 176.124 grams per mole

• 150.134 grams per mole

What volume in liters of a 1.50 molar vitamin C solution contains 5 grams of vitamin C?

• 0.0189 liters

• 0.0200 liters

• 0.0250 liters

• 0.0150 liters