HCC Reaction of pH Of Buffered Solution When Sodium Hydroxide Was Added to It Ques

User Generated

Fhznln27

Science

Highline Community College

Description

All Waste can mix together and then go down the drain. Hot plates are located in the ends of each lab bench.

You may use a transparent test tube holder for your buffer solutions if one is available. This allows you to more easily compare the colors of the unknown solutions to your knowns.

Household chemicals are located at the back table with the cabbage. You can find a few different samples. You do not need to bring your own.

https://wamaps3.s3.amazonaws.com/cfiles/23139/121_...

Question 1:

Data and Observations Part A: Cabbage Indicator

pHColor
2
4
6
7
8
10
12

Part B: Cabbage Indicator

SubstanceColorpHAcidic, Basic, or Neutral
dish soap
shampoo
glass cleaner

Question 2:Data and Observations Part C: Buffers

For this section, you may upload an image of your data tables if you prefer. Files will be graded by hand, separately.

Total Number of Drops of HCl(aq) AddedDI WaterBuffered Solutions
ColorpHColorpH
0
1
2
3
4
5
Total Number of Drops of NaOH(aq) AddedDI WaterBuffered Solutions
ColorpHColorpH
0
1
2
3
4
5

Question 3:To determine the pH of an unknown solution, a student uses adds 10 drops of red cabbage indicator to the solution, but the solution remains colorless.

Can the student determine if the solution is acidic, basic, or neutral? Explain.

Question 4:Consider other tests you have carried out on acids and bases during the quarter.

Suggest another method for determining if the unknown solution is acidic, basic, or neutral.

Question 5:What happened to the pH of DI water when the hydrochloric acid was added to it?

A.)What happened to the pH of DI water when the sodium hydroxide was added to it?

B.)What happened to the pH of the buffered solution when hydrochloric acid was added to it?

C.)What happened to the pH of the buffered solution when sodium hydroxide was added to it?

D.)Briefly describe any differences or similarities for any pH changes observed for DI water compared to a buffered solution when hydrochloric acid was added to each.

E.)Briefly describe any differences or similarities for any pH changes observed for DI water compared to a buffered solution when sodium hydroxide was added to each.

Question 6:Consider a buffer solution that consists of two separate components: the weak acid, HF(aq), and its conjugate base, F-(aq) (added as NaF).

Which component will react with H+(aq) from a strong acid? Write the net ionic equation for the reaction that occurs when H+(aq) is added to the buffered solution.

Which component will react with OH- (aq) from a strong base? Write the net ionic equation for the reaction that occurs when OH-(aq) is added to the buffered solution.

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Explanation & Answer

You can always get back to me for revisions, The Assignment is complete and checked thoroughly. Thanks for choosing me and good luck with studies.

Question 1
Data and Observations
Part A: Cabbage Indicator

pH=2

Light Pink

pH=4

Dark Pink

pH=6

Purple

pH=7

Dark Blue

pH=8

Blue

pH=10

Blue-Green

pH=12

Green-Yellow

Part B: Cabbage Indicator
Color

pH

Acidic, Basic, Neutral

dish soap

Dark Purple

6,5

Acidic

shampoo

Dark Pink

5

Acidic

glass
cleaner

Green

10

Basic

Question 2:
Data and Observations
Part C: Buffers
Dl Water

Buffer

Drops of HCl
added

Color

pH

Color

pH

0

Blue

7

Blue

7

1

Light Purple

6

Blue

7

2

NOT SHOWED

NOT SHOWED

NOT SHOWED

NOT SHOWED

3

Pink

4

Blue

7

4

Light Pink

3

Blue

7

5...


Anonymous
I was having a hard time with this subject, and this was a great help.

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