Note : some questions will display a variable like "nCount" or "SyInput" instead of an actual number in the data summary.

Q# Question Text

5) Data Entry - No Scoring

Enter the precise mass in GRAMS of the potassium iodate used to prepare your primary standard solution.

Your mass precision should be reported to a thousandth of a gram, i.e. 0.302. (Use 3 significant figures.)

Your Answer: 0.536

No Points Possible

6)

Scoring Scheme: 3-3-2-1

If one had weighed out precisely 0.500 g of KIO3 for the primary standard solution and dissolved it in enough deionized water to make a 250 mL solution, the molarity of that solution would be 0.00935 M.

Enter your calculated molarity of the primary standard KIO3

*…show more content…*

Enter the calculated mass percent of NaClO in each of the 3 acceptable trials. Be sure to enter your mass percent values in the corresponding order that you entered your masses of your bleach samples and volumes of your sodium thiosulfate previously.

The bleach sample mass you entered for entry #1 and the volume of sodium thiosulfate you entered above should correspond to the mass percent of NaClO you enter for entry #1 here.

Your Answer: 2.62

You Scored 3 points out of 3 Possible

Your Answer: 2.7

No Points Possible

Your Answer: 2.69

No Points Possible

19) Scoring Scheme: 3-3-2-1

Using your 3 trial values, calculate the average mass percent of NaClO.

Enter the average mass percent of NaClO in the bleach sample. (Use 3 significant figures.)

Average =

Your Answer: 2.67

You Scored 3 points out of 3 Possible

20) Scoring Scheme: 3-3-2-1

Please enter the standard deviation of the average mass percent of NaClO in your bleach samples.

Standard Deviation =

Your Answer: 0.044

You Scored 3 points out of 3 Possible

21) Scoring Scheme: 3-3-2-1

Please enter the calculated 90% confidence limit for the