Today in Chemistry

You will Need:1)Pencil, Colored Pencil2)Log #4 - update3)Acids and Bases Part 2 Bookshelf – Do Not staple4)Student Self Assesment – Bookshelf5) Acids & Bases – Part 1 (picked up last week)6)Periodic Table

Today in Chemistry

Test Corrections + Student Assessment – Due Thur.•Retakes offered Friday at Lunch, •Monday, April 30th before school and at lunch•Tuesday, May 1st before school and at lunch

ACID BASE

ION: A positively or negatively charged atom/molecule

7

NEUTRAL 0-6.9 7.1-14

pH Scale:

Measures the # of H+ ions in a solution (Potential Hydrogen Ions)

Acid Base

Both

Word Bank:

base, pH, salt, acid,

neutralpH

1. One Zip Log Bag with supplies

2. Each person needs 7 test strips

3. Each person need 6 pieces of tape about 2cm long.

Material Manager:

Solution Acid or Base

pH Value

pH Strip

1. Mouthwash

2. Coffee

3. Lysol Cleaner

4. Vinegar

5. Ammonia

6. 7up

Predict Actual Result

8. Bleach has a pH of about 13. If you mix a solution of 50% bleach and 50% water, what would be true about the pH of a the mixture?

A.It would be less than 7B.It would be between 7 and 13C. It would be greater than 13D. There is not enough info to solve

9.Suppose you have already compared the pH values of two substance using 0-14 pH paper. When would a follow-up test using 4.5-7.5 paper be most helpful?

A.When both sub. had a pH value of about 3 on the 0-14 paper

B.When both sub. had a pH value of about 6 on the 0-14 paper

C.When both sub. had a pH value of about 9 on the 0-14 paper

D.When on substance had a pH value of about 5 and the other had a pH value about 7 on the 0-14 paper.

10. Suppose you had needed to neutralize a strong acid (pH2). Describe 2 ways you could do this safely.

11. Explain how OH- values and H+ values determine Acids and Bases.

12. Why is it important to be careful with the things that we put down the drain or that we let evaporate into our air? (3-4 sent.)

1.Work on Acids and Bases Parts 1 & 2 questions

#22 – has two answers#25 (NH4)2SO4

#24 “C” is listed twice – 2nd one should be a “D ”

1. Periods 1,3,5,6,8 – Acids & Bases due Friday

2. Period 2 – Acids & Bases due Monday – Apr. 30

3. Cumulative STAR Cards Quiz #4 – 1-101 – Tomorrow

4. Test # 3 corrections and self assess.- Due Thur.