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Science - Solution

QuestionAnswer
What is a solution? It is a mixture of solute and solvent.
What is a solvent? It is a liquid that dissolves other substance.
What is a solute? It is a substance that dissolves in a liquid.
List some properties of solution. The properties are -It can be seen through. -Could be coloured/colourless. -Nothing leaves in the filter paper when it passes through a filter paper.
What is a suspension? It is a mixture of liquid with undissolved particles.
Give some examples of a suspension. Orange juice, muddy water, correction fluid.
What is solubility? The maximum amount of solute that can dissolve in a solvent.
What can affect solubility? Temperature, the surface area, type of solute and type of solvent.
What can we do to make a solid dissolve faster in water? Increase the solvent temperature, crush the solute into small pieces or stir the solvent.
What does saturated solution means? When no more solute can dissolve in the solvent.
How do we measure how acidic or alkali a substance is? By using an indicator.
What is an indicator? It is a substance that are one colour in acids and another in an alkali.
State the colour of the litmus paper in (a) acidic (b) alkali. (a) Red (b)Blue
What pH values do acids, alkali and pure water have? pH1-7 , 7-14 , 7
What are the properties of acid? -It has sour taste. -It neutralises alkali. -The lower the pH value the substance is, the more corrosive the substance is.
What are the properties of alkali? -It has bitter taste. -Feel slippery. -Higher the pH values of alkali can be corrosive, such as sodium hydroxide. -It neutralises acid.
What is the process called when an acid and an alkali react together? Neutralisation.
What are the differences between acid and alkali? Taste : sour vs bitter, Feel : burning vs slippery, pH : low vs high,
What is an acid? A substance having a sour taste and turns litmus paper red.
What is an alkali? A substance having a bitter taste and turns litmus paper blue.
What are common laboratory acids? Hydrochloric acid, sulphuric acid and nitric acid.
What are common laboratory alkali? Sodium hydroxide, calcium hydroxide and ammonia solution.
Created by: yuhantan
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