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Gullett-Chem-Ch1
Chemistry-Ch1-Alchemy
| Term | Definition |
|---|---|
| graduated cylinder | tool with markings to measure volume |
| Erlenmeyer flask | tool used to mix and/or hold solutions. Round glass container with wide base and narrow top. |
| beaker | tool used to approximate volume, mix and/or hold solutions. Round glass with pour spout. |
| test tube | tool used to mix and/or hold small volumes of solution for reactions or observation. |
| stiring rod | long glass rod used for mixing solutions. |
| watch glass | convex glass circle (looks like a lens) that is used to hold dry substances for observation. |
| funnel | glass or plastic cone-shaped tool used with filter paper to filter precipitates from solutions |
| ring stand | metal stand with a base, long rod used to hold various pieces of equipment above another surface or tool. |
| Bunsen burner | tool that uses natural gas as fuel for a flame to heat substances |
| hot plate | electric ceramic plate that is used to heat substances in glassware such as beakers |
| fume hood | Special cabinet sized work space that, when turned on, will circulate air out of the work space to prevent exposure to harmful fumes and gases |
| physical properties | properties of a material that can be determined without chemically altering the substance such as mass, density, melting and boiling points |
| chemical properties | properties of a material that cannot be determined without chemcially altering the subtance such as flamibility, oxidation, response to acids |
| chemistry | the study of matter - what substances are made of, how they behave, and how they can be transformed |
| matter | any substance that has mass and volume |
| mass | the amount of material in a given sample |
| volume | the amount of space a given sample occupies |
| accuracy | how close the measured value is to the true value |
| precision | how close each measurement is to repeated measurements |
| significant figures | rules in measurement that allow you to indicate the degree of certainty in measurements |
| density | mass divided by volume. The amount of material packed into a given space. |
| intensive properties | properties that do not change if the quantity of the substance changes, they can be used to idenify an unknown substance. Example: density |
| extensive properties | properties that change based on the quantity of the substance, they cannot be used to identify an unknown substance. Examples: mass and volume |
| meniscus | the point at which you read the volume of a liquid in a graduated cylinder - the bottom of the curve at the surface of the liquid |
| water displacement | the method of determining the volume of an irregularly shaped object by submerging it in water and measuring the change of volume |
Created by:
lpgullett
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