50 grams of sodium chloride to 500 grams of water, what will the freezing points

Question

50 grams of sodium chloride to 500 grams of water, what will the freezing points be of the resulting solution? Kr(H_2O) = 1.86 degree C/m. What is the names of the lab equipment in below in fig. 2. In a reaction involving the iodination of acetone, the following reaction mixture was used 20.00 mL 2.0M acetone, 35.00 mL 0.90 M HCl, 20.00 mL 0.0050 M I_2, and 10.0 mL water. What was the molarity of the Iodine in the reaction mixture? (Recall that M1V1 = M2V2.) The color of the above reaction mixture (problem 4) disappeared in 550 seconds indicating the end of the reaction. What was the rate of the reaction?

Explanation / Answer

To calculate the molarity of I2 in the reaction mixture we use following formula;

M1V1= M2V2

Here M1 = 0.0050 M

V1= 20.00 ml

M2 = ?

V2= total volume

= 20.00 ml +35.00 ml +20.00 ml +10.00 ml

= 85.00 ml

Now, calculate the M2 for I2:

M1V1= M2V2

0.0050 * 20.00= M2* 85.00

M2= 0.00118M

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