Science - Compounds and Mixtures
A short course covering the basics of compounds and mixtures. Ideal for students aged 9 upwards for revision, or for adults wishing to learn more on the subjects
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46 questions
| 🇬🇧 | 🇬🇧 |
| What is the definition of a mixture in terms of chemistry? | Substances that are not chemically joined together |
| What will happen if you heat a solvent to a higher temperature, due to the particles moving faster? | More solute will dissolve in it |
| If you dissolved salt in water, and then evaporated the water, what would happen? | The salt would reappear |
| What is the name of the measure of how much of a certain type of solute will dissolve in a liquid? | Solubility |
| What happens when solid particles mix with the liquid particles they are dissolved in? | A solution is formed |
| When dissolving items in chemistry, what would you call the solid and the liquid it is dissolving in? | The solute and the solvent |
| What sometimes happens when you add a solid object to a liquid in chemistry? | The bonds holding the solid particles together break |
| What is the process follwed by the distillation method? | A mixture of liquid and solid is heated, cooled and condensed, allowing liquid and solid to be collected separately |
| Each pure chemical substance has a fixed..? | Melting and boiling point |
| What is the fractional distillation method ideal for? | Separating fuels from crude oil |
| What is the process followed by fractional distillation? | The mixture is heated to each substances boiling temperature, so each part is evaporated separately |
| What is the name of the process that allows the separation of a mixture of liquids? | Fractional distillation |
| What is the chromatography method an ideal use for? | Separating out different substances in an ink or dye |
| What is the process follwed by the chromatography method? | Putting a mixture on a stationary filter, and allowing the solvent to separate the different parts out, as they travel at different rates |
| What is the process follwed by the evaporation method? | Heating liquid until it turns to steam, leaving behind solids that were diluted in the liquid |
| What is the process followed by the filtration method? | Passing a liquid through a filter to remove insoluble parts |
| What do each of the separation methods make use of in order to separate the different parts out? | Each parts properties |
| What are the for main methods used to separate mixtures? | Distillation, Chromatography, Evaporation and Filtration |
| What is the distillation method ideal for? | Collecting pure water from a mixture |
| If two identical atoms join together, does it become a compound or remain an element? | Remains an element |
| When calcium, carbon and oxygen join together to create a new compound, what is the compunds name? | Calcium carbonate |
| When copper, sulfur and oxygen join together to create a new compound, what is the compunds name? | Copper sulfate |
| When magnesium and oxygen join together to create a new compound, what is the compunds name? | Magnesium Oxide |
| When sodium and chlorine join together to create a new compound, what is the compunds name? | Sodium chloride |
| What do all compounds created via a chemical reaction have? | Chemical formula |
| What happens during a chemical reaction that forms new products? | Reactants combine or split apart |
| What is the definition of a compound? | Two or more elements joined together |