Chemistry- Observations Flashcards Preview

Grade 9- July Exams > Chemistry- Observations > Flashcards

Flashcards in Chemistry- Observations Deck (12):
1

Potassium permanganate crystals added to a beaker of water
(Beginning)

Water is clear
Potassium permanganate crystals are small, purplish-black, solid and pretty

2

Potassium permanganate and water
Middle

Purple 'stream' appears in the water.
Water slowly begins to change colour and becomes a darker purple

3

Potassium permanganate and water
(End)

Water is now purple

4

Strip of magnesium placed in Hydrochloric acid
(Beginning)

HCL is clear
Magnesium ribbon is a shiny, solid, pliable metal with some black turnout in the surface

5

Strip of magnesium and Hydrochloric acid
(Middle)

HCL bubbles and gives off an opaque gas.
Test tube gets warm

6

Strip of magnesium and Hydrochloric acid
(End)

Hydrogen gas is made.
Magnesium dissolves completely.
HCL stays clear

7

Blowing bubbles into lime water
(Beginning)

Like water is clear

8

Blowing bubbles into lime water
(Middle)

Begins to turns milky white, opaque colour

9

Blowing bubbles into lime water
(End)

Completely milky white

10

Heating moth balls (naphthalene) in a large test tube
(Beginning)

Moth ball is white and solid

11

Heating moth balls
(Middle)

The moth balls melt as they are heated.
Liquid state is clear or transparent.

12

Heating moth balls
(End)

Once hit it is completely liquid and as it cools it becomes solid and white again in the bottom of the test tube.

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