Dry chemicals Sometimes you will need to make a solution of a specific molarity (M) from dry chemicals that need to be weighed. Recall that M units g/mole. You can use the equation below to determine the mass of the chemical you need to make the solution. = moles / L and the molecular weight of a chemical is in the Mass (g) = Molarity (M) * Volume (L) * Molecular Weight (g/mole) To get the units to cancel out, you need to use the units in the equation above. You can obtain t molecular weights from the bottle in which the chemical is stored (or by using a periodic table Example: Make 300 mL of 100 mM glycine 100 mM =0.1 M= 0.1 moles/L 300 mL = 0.3 L The molecular weight of glycine 75.07 g/ mol. %3D 0.1 moles/L 0.3 L 75.07 g/mole = 2.25 g of glycine %3D How much of the dry chemical is needed to make the following solutions? Your solvent will always be deionized water (DI H2O). Show your work. a. Make 25 mL of a 0.05 M glycine solution. The molecular weight of glycine is 75.07 g / r Make 500 mL of a 10 mM NaCl solution.

Dry chemicals Sometimes you will need to make a solution of a specific molarity (M) from dry chemicals that need to be weighed. Recall that M units g/mole. You can use the equation below to determine the mass of the chemical you need to make the solution. = moles / L and the molecular weight of a chemical is in the Mass (g) = Molarity (M) * Volume (L) * Molecular Weight (g/mole) To get the units to cancel out, you need to use the units in the equation above. You can obtain t molecular weights from the bottle in which the chemical is stored (or by using a periodic table Example: Make 300 mL of 100 mM glycine 100 mM =0.1 M= 0.1 moles/L 300 mL = 0.3 L The molecular weight of glycine 75.07 g/ mol. %3D 0.1 moles/L 0.3 L 75.07 g/mole = 2.25 g of glycine %3D How much of the dry chemical is needed to make the following solutions? Your solvent will always be deionized water (DI H2O). Show your work. a. Make 25 mL of a 0.05 M glycine solution. The molecular weight of glycine is 75.07 g / r Make 500 mL of a 10 mM NaCl solution.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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