Chem 1
How do you separate salt from water?
Let the Water Evaporate
In a chemical equation, the substances written on the left side are called?
Reactants
What is a SOLID that forms from a solution during a chemical reaction?
Precipitate
On a line graph, the line that shows a temperature DECREASE of a substance is.....
Exothermic or Endothermic
Endothermic
March 19th
Chemical or Physical Change?
Wood Burning
Chemical
2H2 + 02 ------> 2H20
Which is the reactant in the equation?
2H2 + 02
On a line graph, the line that shows a temperature INCREASE of a substance is.....
Exothermic or Endothermic
Exothermic
2H2 + 02 ------> 2H20
Which is the product in the equation?
2H20
Give one example of a physical change.
Answers will vary
Chemical or Physical Change?
Sugar Dissolving in Water
Physical
Exothermic or Endothermic?
Candle being lit
Exothermic
True or False
Matter is neither created or destroyed
True
If a clear liquid is mixed with a blue liquid in a beaker and a white solid is formed at the bottom of the beaker. Would the white solid be considered a new substance with different properties? Explain.
Yes
Give one example of a chemical change.
Answers will vary.
What occurs when existing bonds break down and form new bonds?
Chemical Change
Exothermic or Endothermic?
Something getting cooler
Endothermic
2Na + Cl2 -----> 2NaCl
Which is the reactant in the Equation?
2Na + Cl2
If the combined mass of starting reactants is 70 grams, what would the ending mass of the products be?
70 grams
Where do the Phillies do their spring training?
Clearwoooooooder Florida
In a chemical equation, the substances written on the right side are called?
Products
2Na + Cl2 -----> 2NaCl
Which is the product in the Equation?
2NaCl
Physical or Chemical Change
Wax melting
Physical
Exothermic or Endothermic?
Something getting warmer
Endothermic
Which equation is balanced?
Al + O2 ---> Al2O3
or
C+ H2O ---> CO + H2
C+ H2O ---> CO + H2