MOLARITY AND DENSITY Header Chemistry Experiment 17 Molarity

MOLARITY AND DENSITY

Header Chemistry Experiment #17 Molarity and Density Name Date __ Mods__ Partner

Objective To determine the relationship between molarity and density.

Prelab Questions What is the molarity triangle? What is the gram formula weight for Na. Cl?

Lab Safety

Procedure You will be assigned a particular molar solution of Na. Cl to make. Write down your solution concentration below: � � 1. 2. 3. 4. My molarity is _____________ My volume is ______________ You must first perform the calculations to determine how to make the solution, following the instructions below. Show all of your work in the calculations section of your lab. � Convert m. L to L: � What is the formula weight for Na. Cl? � Use the molarity equation to determine the moles of Na. Cl needed to make your solution: � Convert moles of Na. Cl needed to grams of Na. Cl needed. Check your calculations with your teacher. Make the solution. As a class, compare all the Na. Cl solutions.

Calculations

Conclusion 1. 2. 3. Prior to adding the food coloring, d the solutions look the same or different? Explain your answer. We added food coloring to the solutions and layered them in the graduated cylinder. Draw, in detail and color, what is observed. Why did the solutions layer, as drawn in #2? How is this related to molarity? Explain.