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Mixture Questions
Question | Answer |
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How is Mattered classified? | Matter is classified in 3 groups. The groups are solid,liquid, and gas. |
What are the properties of mixtures? | The physical properties of a mixture, such as its melting point, may differ from those of the components. Some mixtures can be separated into their components by physical (mechanical or thermal) means. |
What are the different types of mixtures? | The 2 types of mixtures are distillation and magnet. Distillation is the process that seperates a mixture based on the boiling points of the component. Magnet seperates a mixture of the elements iron and aluminum. |
What are the 2 classes of mixtures? | Solution: a mixture that appears to be a single substance. Composed of particles of two or more substances. Examples) tap water, soft drinks, gasoline, gasoline, air, milk, and steel. Suspensions:mixture in which particles of a material are dispersed |
What technique does a scientist use to seperate the following types of mixtures: | |
a) liquid=gas | Scientists use the process call Distillation. Distillation is a process that seperates a mixture based on the boiling points of the components. |
b) liquid=liquid | Scientists just heat up the mixtures, until the water evaporates. |
c) substances based on density | Scientists a a machine called a Centrifuge. A centrifuge seperates mixtures by the density of the components. |
d) metals= non metals | A magnet can be used to seperate a mixture of the elements iron and aluminum. Iron is a metal, but aluminum is a non-metal. |
larger particles | Scientists just sometimes pick them off the substance. This change is a physical change of the mixture. The identities of the substances do not change. |
What is a mixture ? | A mixture is a combination of two or more substances that are not chemically combined. When two or more materials are put together, they form a mixture if they do not react to form a compound. |
What is a compound ? | A compound is a pure substance composed of two or more elements that are chemically combined. Elements combine by reacting, or undergoing a chemical change, with one another. |
What is an element ? | An element is a pure substance that cannot be separated into simpler substances by physical or chemical means. |
What is a pure substance ? | A pure substance is a substance in which there is only one type of particle. So, each element contains only one type of particle. |
Whats the difference between a metal and a non-metal ? | Metal conduct heat energy and electric currents. Non-metals doesn't conduct heat energy nor electric currents. |
How are compounds identified ? | Compounds are identified by their chemical properties. Or by their own physical properties. |
How are compounds broken down ? | Some compounds can be broken down into their elements by chemical changes. Other compounds break down to form simpler compounds instead of elements. |
Is there a chemical change when making a mixture ? | No , there is no chemical change happening. So, each substance in a mixture has the same chemical makeup it had before the mixture formed. |
Why do substances in a mixture keep their identities? | They keep their identity the same because there is no chemical change occurring. Since there is no chemical change, the substances stay the same and keep their identity. |
Whats the difference between a solution, solvent, and a solute? | A solution is a mixture that appears to be a single substance. The the solute is the substance that is dissolved.The solvent is the substance in which the solute is dissolved. A solute must be soluble, or able to dissolve, in the solvent. |