Warm-Up 9/24/141) Please put your Nutrient paper

into the basket.2) Continue on Pre-Lab questions

from yesterday.Pre-Lab Questions

1) What is the purpose of the lab?2) What is the chemical name of

vitamin C?3) Why is vitamin C important to

have in your diet?

Objective 9/24/14Discuss how to determine the

amount of Vitamin C in a tablet.

Agenda 9/24/14Finish Pre-Lab Questions

Pre-Lab Questions4) What is the recommended daily

allowance of vitamin C?5) What chemicals are we using in

this lab?6) What types of chemical

reactions are going to occur in this lab?

7) What color will indicate that all the vitamin C in the sample has been consumed?

Pre-Lab Questions1)What is the purpose of the lab?2)What is the chemical name of

vitamin C?

Pre-Lab Questions3) Why is vitamin C important to have in your diet?

Pre-Lab Questions4) What is the recommended daily allowance of vitamin C?

Pre-Lab Questions5) What chemicals are we using in this lab?• Iodide ion (I-) potassium

iodide (KI) solution• Starch• Iodate ion (IO3

-) 0.05 M potassium iodate (KIO3) solution• Ascorbic acid (vitamin C)

C6H8O6

Pre-Lab Questions6) What types of chemical

reactions are going to occur in this lab?1: Iodate ion reacts with iodide ion to form iodine.

2: Iodine reacts with vitamin C. 3: No more vitamin C iodine reacts with starch.

Pre-Lab Questions1: Iodate ion reacts with iodide ion to form iodine.

IO3- + I- I2

2: Iodine reacts with vitamin C. I2 + C6H8O6

3: No more vitamin C iodine reacts with starch.

I2 + starch

Pre-Lab Questions7) What color will indicate that all

the vitamin C in the sample has been consumed?

Vitamin C Titration Lab1) Form a group of three or four.

2) Read procedure for part A only.

3) Reword procedure so that you know exactly what you and your lab group will be doing during the lab. This will be turned into Ms. Au-Yeung by the end of class.

4)With your lab group, determine what two types of a liquid you would like to test

(ex. fresh vs. frozen orange juice). You will be responsible for bringing these samples in.

Timeline for Project

Next Friday, 10/3/14Presentation due

HAVE A FABULOUS REST OF THE WEEK AND

WEEKEND!