Experiment 4: Acids and Bases

Question 1

An acid is a _____.

Answer 1

Proton Donor

Question 2

A base is a _____.

Answer 2

Proton acceptor

Question 3

3 methods to test pH?

Answer 3

Litmus paper, universal indicator, pH meter

Question 4

Litmus paper turns _____ with acids and ____ with bases.

Answer 4

Red w/ acids

Blue w/ bases

Question 5

Universal indicator colors?

Answer 5

Mixture of dyes that read between pH:4-11 ROYGBIV
4-red
5-orange
6-yellow
7-green
8-dark green
9-blue
10- violet?
11-violet

Question 6

pH=?

Answer 6

-log[H+], (p= -log of)

Question 7

Procedure:

Answer 7

1) Add universal indicator to a bunch of stuff and write down color
2) Use red cabbage juice and dilute grape juice as indicators too.

Question 8

Why is soda acidic?

Answer 8

CO2 dissolves into carbonic acid (H2CO3) and include acids like citric acid and phosphoric acid

Question 9

Following table with [H3O+}, [OH], pH, and acid neutral or base

Answer 9

?

Question 10

What is a salt?

Answer 10

Something formed by an acid-base reaction.

Question 11

What should you do with solids in this lab?

Answer 11

NOT SINK

Question 12

Other indicators we used?

Answer 12

1) Red cabbage juice (If boil too long denatures) (decent)

2) Dilute grape juice (terrible method)