Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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

Equations & Reaction

Regents Chemistry-Equations & Reactions

Chemical Reaction   Occurs when one or more substances change to form new substances  
Reactants   The starting materials in a chemical reaction  (on the left side)
Products   The substances that are the result of the change in the chemical reaction  (on the right side)
Signs of a chemical reaction Formation of precipitate, temperature change, color change, or formation of gas  
Law of Conservation of Mass   Matter can neither be created nor destroyed, it can only change form  
Chemical Equation   A way of writing the changes that occur during a chemical reaction  
coefficients big numbers put in front of formulas to balance an equation
synthesis combine 2 or more reactants to make a bigger product
decomposition break down a big reactant into smaller chemicals
single replacement One element is kicked out of a compound and replaced by another. Table J tells if this can be spontaneous.
double replacement Chemical square dance do-si-do. Positive and negative ions trade partners.
precipitate A cloudy, solid that forms from soluble reactants
subscripts The little numbers after the symbols to tell how many atoms there are
The reason why reactions occur Elements react to become more stable
Endothermic A reaction that absorbs (gains) energy. Products are LESS stable than reactants.
Exothermic A reaction that releases energy. Products are MORE stable than reactants.
Created by: etucci



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards