Chemical Reactions and Indicators

Chemical Reactions and Indicators

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial demonstrates a chemical experiment involving a pH indicator, sodium hydroxide, and a dehydration reaction with sugar and sulfuric acid. The instructor explains the setup, observes color and temperature changes, and highlights safety precautions. The experiment provides evidence of chemical changes through visual and thermal observations.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial color of the pH indicator in a neutral solution?

Red

Blue

Green

Yellow

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What substance is added to the water to create a strong base?

Sodium chloride

Sodium hydroxide

Potassium nitrate

Calcium carbonate

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What color change indicates the presence of a strong base?

Blue to purple

Red to blue

Yellow to red

Green to yellow

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the chemical formula for sucrose used in the experiment?

C2H5OH

C6H12O6

C12H22O11

CH4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of reaction occurs when sulfuric acid is added to sugar?

Hydration

Dehydration

Combustion

Neutralization

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial color change observed when sulfuric acid is added to sugar?

Blue to green

Yellow to black

White to yellow

Red to blue

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What evidence indicates that the reaction is exothermic?

Color change

Gas evolution

Temperature increase

Solid formation

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