a.) Write a detailed procedure for preparing 50.0 mL of 1.20 M HCL. For this pro
ID: 962611 • Letter: A
Question
a.) Write a detailed procedure for preparing 50.0 mL of 1.20 M HCL. For this procedure you have only the following supplies available (plus any safety gear, equipment, and supplies required): a 10 mL graduated cylinder, a 50.0 mL volumetric flask, many 100 mL beakers, DI water, and 12.0 M HCL
b.) Write a detailed procedure for preparing 50.0 mL of 0.0120 M HCL. For this procedure you have only the following supplies available (plus any safety gear, equipment, and supplies required): a 10 mL graduated cylinder, a 50.0 mL volumetric flask, many 100 mL beakers, DI water, and 12.0 M HCL
Explanation / Answer
I)
put on all safety --> lab coat, globes, gas mask for fumes, and glasses
then, perform calculation
M1V1 = M2V2
50*1.2 = 12*V1
V1 = 50*1.2/12 = 5 mL of acid needed
2) measure 5 mL of acid, since we will use this for the overall recipe in the 10 mL graduated cilynder
3) put the 5 mL to a beaker
4) add water, until total solution volume is about 50 mL
5) stirr and make sure volume remains V = 50 mL
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