Prelab for 8- Analysis of Hypo Name: David H. and titrated a bleach exactly as p

Question

Prelab for 8- Analysis of Hypo Name: David H. and titrated a bleach exactly as procedure, except only a single titration described in the experiment 0.100 M Na2S2O3 14.22 was bleach unknown was 1.042 g/mL. The density of the original, undiluted used in the titration 1. Calculate the number of moles of Na2s203 2. Calculate the number of moles of clo in sample t Hint: see (1) and (2) in the background section of the experiment to get the proper ometry. 3. Calculate the grams of the bleach sample assuming all of the hypochlorite ion comes from sodium 4. the mass in grams of UNDILUTED bleach that was in the sample of bleach titrated. Hint: Additional information is provided in question 4 of the Data Analysis section of the experiment. 5. Using the answers to questions 3 and 4 calculate the weight percent of Naclo in the undiluted bleach sample.

Explanation / Answer

1. 0.00142 mol of Na2S2O3 is used in the titration.

explanation:

Given, 14.22 mL of 0.100 M Na2S2O3

0.100 M means 0.100 mol/ L or 0.100mol/ 1000mL

Now since, there is 14.22 mL of 0.100 M Na2S2O3, It means there is 14.22 mL x 0.100mol/ 1000mL = 0.00142 mol

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