Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 21

QuestionAnswer
Balanced Chemical Equation The same number of atoms on both sides of the equation.
Catalyst A substance the speeds up a chemical reaction without completely changing itself.
Chemical Equation A way to describe a chemical reaction using chemical formulas and other symbols.
Chemical Reaction A change is which one or more substances are converted into new substances.
Coefficient Represent the number of units of each substance taking part in each substance.
Combustion Reaction Occurs when a substance reacts with oxygen.
Decomposition Reaction Occurs when one substance breaks down, decomposes, into two or more substances.
Double Displacement Reaction The positive ion of one compound replaces the positive ion of the other to form two new compounds.
Endergonic Reaction Sometimes a chemical reaction requires more energy to break bonds than is released when new ones are formed.
Endothermic Reaction When the energy needed is in the form of thermal energy.
Exergonic Reaction Less energy is needed to break the original bonds than is released when new bonds form.
Exothermic Reaction When the energy given off is primarily in the form of thermal energy.
Inhibitor Used to slow down chemical reactions.
Oxidation Describes the loss of electrons.
Precipitation An insoluble compound that comes out of solution during this type of reaction.
Product New substances produced.
Reactant New substances that react.
Reduction Describes the gain of electrons.
Single-displacement Reaction When one element replaces another element in a compound.
Synthesis Reaction Two or more substances combine to form a new substance.
Created by: Christopher H.