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…*

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