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What is Chemistry

521 ch 1, 2

QuestionAnswer
Define Matter (anything that has mass and takes up space)
Define Chemistry the study of the composition of matter and the changes it undergoes.
What aspects of life does Chemistry affect? all aspects of life and most natural events since all living and non living things are made up of matter.
what is chemistry known as? it is known as the central science because it is fundamental to the understanding of other sciences.
Describe Organic chemistry its defined by the study of all compounds containing carbon
what is inorganic chemistry the study of chemicals that generally don't contain carbon.
where do you find a product of inorganic chemistry found in non living organisms like under rocks.
what is biochemistry the area of chemistry that focuses on processes that take place in organisms
what is an example of biochemistry digestion and muscle contraction.
what is analytical chemistry it focusses on the composition of matter.
what is an example of analytical chemistry measuring the level of carbon dioxide in the atmosphere.
describe physical chemistry the area of chemistry that deals with the mechanism, the rate, and the energy transfer that occurs when matter undergoes change.
pure chemistry is the pursuit of chemical knowledge for its own sake. may not have immediate use for knowledge.
applied chemistry research directed toward a practical goal or application
why does chemistry affect all aspects of life and most natural events? because all living and non-living things are made up of matter. matter is anything that has mass and takes up space
name the 5 traditional areas into which chemistry can be divided. organic, physical, analytical, inorganic, biochemisry
name the 3 general reasons to study chemistry? 1. it explains the natural world 2. it prepares people for career opportunities 3. it produces informed citizens.
how has modern research in chemistry impacted society? modern research in chemistry can lead to technologies that aim to benefit the environment, conserve and produce energy, improve human life, and expand our knowledge of the universe.
how can a knowledge of chemistry help us be a more informed citizen the government provides funds for scientific research. through the knowledge of chemistry and then voting on it we are being an informed citizen.
define Mass of an object a measure of the amount of matter that an object contains.
define gas a form of matter that takes the shape and volume of its container; a gas has no definite shape or volume
what is vapor describes the gaseous state of a substance that is generally a liquid or solid at room temperature.
what is physical change a change during which some properties of a material change, but the composition of the material does not change. sand and water.
what is a chemical property the ability of a substance to undergo a specific chemical change
what is a chemical change a change that produces matter with a different composition than the original matter
chemical reaction a change in which one or more reactants change into one or more products; characterized by the breaking of bonds in reactants and the formation of bonds in products
whats a reactant a substance present at the start of the reaction
what is a product the substance that is produced in a chemical reaction
name 4 possible clues to chemical change transfer of energy a change in color the production of gas or the formation of a precipitate
chemical changes don't involve the transfer of energy... true or false false. all chemical changes include the transfer of energy
what is a precipitate a solid that forms and settles out of a liquid mixture.
what happens during any chemical reaction the mass of the products is always equal to the mass of the reactants.
state the law of conservation of mass any physical change or chemical reaction, mass is conserved. mass is neither created nor destroyed.
describe a mixture a physical blend of two or more components.
based on the distribution of their components, what can mixtures be classified as either heterogeneous or homogeneous mixtures.
what is a homogeneous mixture mixture in which the composition is uniform throughout. tomato soup
what is a heterogeneous mixture a mixture in which the content is not the same throughout. chicken soup
what are solutions many are liquids but some are gasses like air and some are silids like stainless steel.
what is a phase its used to describe any part of a sample with uniform composition and properties
what would be a good way to separate mixtures using the differences in physical properties.....alcohol and water.....you could boil the alcohol off or freeze the solution.
the process that separates a solid from a liquid in a heterogeneous mixture is called.... filtration
what is a way to separate water from other components? distillation
describe distillation a liquid is boiled to produce a vapor that is then condensed into a liquid.
what is an element the simplest for of matter that has a unique set of properties
describe a compound a substance that contains two or more elements chemically combined in a fixed proportion.
state the difference between an element and a compound compounds can be broken down into simpler substances chemically but elements cannot.
how do you know a material is a substance or a mixture? if its a substance then the composition of the material is fixed. if its a mixture the composition of a material may vary.
how to chemists represent elements using chemical symbols
how do chemists represent compounds using chemical formulas
describe the periodic table is an arrangement of elements in which the elements are separated into groups based on a set of repeating properties.
what is a perk of have the periodic table the table allows you to easily compare the properties of elements or a group of elements combined.
what is each horizontal row of the periodic table a period
how many periods are there in the periodic table 7
distinguish between extensive property and intensive property both are types of physical properties of matters. intensive don't depend on the amount of matter present but extensive do.
CC between a mixture and a pure substance
CC homogeneous and heterogeneous A homogeneous mixture has the same uniform appearance and composition throughout. A heterogeneous mixture consists of visibly different substances or phases.
is matter homogeneous or heterogeneous matter is both homo and hetero
what physical properties could be used to separate iron filings from table salt. you could separate with a magnet or by adding water
air is mainly a mixture of nitrogen and oxygen, with small amounts of other gases such as argon and carbon dioxide. what property would you use to separate the gases in air? distillation
what always happens during a chemical change? the composition of matter always changes
how are the mass of the reactants and the mass of the products of a chemical reaction related during any chemical reaction the mass of the products is always equal to the mass of the reactants.
physical property a property that can be observed or measured without changing the substances composition. see, hear, feel, touch, smell, measure.
3 characteristics of solid has defined shape and volume, particles packed tightly together, incompressible.
3 characteristics of liquid takes shape of container but overall volume doesn't change, particles packed les tightly together, incompressible
3 characteristics of gas takes shape of container but will expand to increase to volume of container, particles packed loosely together, easily compressed.
Created by: tmacphee114647
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