Hurumanu - crystallisation

Aim: To learn about a saturated solution and how to make crystals

Crystal video

Definition of a solution: 

A liquid mixture, when something is dissolved into a liquid (eg: sugar in water) 

Definition of saturated: 

Having or holding as much as can be absorbed of something (when no more sugar or borax can be dissolved into the water)

In groups of three, you will make three different types of crystals and compare the results.

Borax Crystals

Borax Crystals time-lapse video

Ratio; 3 Tablespoons Borax per 1/2 cup water

Materials

1) 1 cup

2) a mixing stick

3) hot water

4) pipe cleaners

5) peg

Process

Step 1: Add warm water to a cup

Step 2: Add 6 scoops of borax into the water

Step 3: Mix it till dissolved

Step 4: Grab 3 pipe cleaners and fold them into a star (fold them like a star make sure there is one that is long)

Step 5: Afterwards grab the star and pin the long part to the peg 

Step 6: Add the star to the cup and have the peg holding the star up but make sure it is touching the water

Sugar Crystals

Sugar crystals video

Ratio: 1 cup sugar to 1/2 cup water

Materials

1) 1 cup

2) a mixing stick

3) a string

4) warm water

5) stick

Process

Step 1: Pour warm water into the cup

Step 2: Add 6 scoops of sugar

Step 3: Mix all the sugar until it is dissolved

Step 4: Grab a string and knot it to a stick (string is tied in the middle)

Step 5: Place the stick from the two on the edge of the cup so that the wire is hanging in the water

Salt Crystals

Salt crystals time-lapse video

Ratio: 4 Tablespoons salt to 1/2 cup water

Materials

1) a cup

2) a mixing stick

3) warm water

4) string

5) stick

Process

Step 1: Pour warm water into the cup

Step 2: Add 3 scoops of salt

Step 3: Stir till dissolved

Step 4: Grab a string and a stick and knot the string to the stick

Step 5: Put the string in the cup and have the stick on the edge

Step 6: Then wait for 1 week