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Description
Flashcards by Laila Al-Refai, updated more than 1 year ago
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Created by Laila Al-Refai
almost 5 years ago
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| Question | Answer |
| KS3 Chemistry year 7 | States of matter + solutions acids and alkalis simple chemical reactions |
| what are the three states of matter? | solids, liquids and gasses |
| what's the name of converting a solid to a liquid? | melting |
| what happens when you overheat a liquid and why? | the particles spread out and it turns into a gas |
| what's the name of turning a gas to a liquid? | condensation |
| what's the difference between solute and solvent? | solvent is the liquid in a solution and solute is the solid |
| what's evaporation? | evaporation is overheating a solution so the solvent turns into gas and separates from the solute |
| how is filtration done? | take a solution then pour it through a funnel. the leftover solid is called residue and the liquid that has passed through is called filtrate. |
| what does insoluble mean? | insoluble means non-dissolveable |
| what does saturated mean? | saturated means no more solids can be dissolved in this liquid. |
| what color is blue litmus paper in an alkali? | stays blue |
| what is neutralization? | its when you add an acid to an alkali so the substance is balanced |
| how do antacid pills work? | antacid pills are made of alkalis and neutralize the acidity in your stomach. anti acid. |
| what is a base? | a base is an insoluble alkali |
| what is the difference between a chemical and physical reaction? | a physical reaction is reversible |
| what are reactants? | the things we add together in word equations |
| acid + metal oxide= | salt + water |
| what is the test for hydrogen? | add a lit splint into the tube, if there is hydrogen it will make a pop sound. |
| what is the test for carbon dioxide? | when you add lime water, it will turn milky. |
| what do you need to start a fire? | oxygen, heat and fuel |
| what is combustion? | combustion is a natural fire |
| what is an oxide? | an oxide is when oxygen and metal burn together |
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