Sugar in black tea is example of
Dissolving
The volume of water is kept the same; The temperature is changed; The number of spatulas used is measured. Which one is the independent variable?
Temperature
In a cup of coffee, is water the solvent or the solute?
The solvent
What does it mean when some food dyes contain only one substance?
They are pure substance
Which salt is the most soluble at 80 degrees celcius?
Potassium nitrate
The technique used to separate out the coloured inks
Paper chromatography
When we measure the solubility of a solute, we must use the same ... of water
Volume
Butter in a frying pan is example of
Melting
The volume of water is kept the same; The temperature is changed; The number of spatulas used is measured. Which one is the dependent variable?
The number of spatulas
What does it mean when some food dyes contain a mixture of substances?
They are not a pure substance
The substance that dissolves
Solute
Solute + solvent, together they will make a ...
Solution
The substance that it dissolves into
Solvent
Why some inks, such as the ink in permanent marker pens cannot be separated on the paper chromatography soaked in water?
Because some inks are not soluble in water, we need to use a different solvent, such as alcohol
A solid that does not dissolve in a liquid
insoluble
What name is given to a solution when no more of solute can be dissolved in it?
A saturated solution
The resulting image on the paper when we separate out the coloured inks
Chromatogram