Reactions + Classifying Matter 2425

Front

What is the name of a scientific equation that uses symbols as well as formulas?

Back

Chemical Equation or Chemical Reaction

Front

What are the starting materials in a chemical reaction called?

Back

Reactants (left side of the reaction)

Front

What are the substances formed from a chemical reaction called?

Back

Products (right side of the reaction)

Front

What is the symbol that separates the reactants from products called?

Back

Arrow or yields sign ( -->)

Front

What is a number placed in front of a chemical symbol or formula called?

Back

Coefficient

Front

What is a number listed below and to the right of a chemical symbol in a formula called?

Back

Subscript

Front

What do the following symbols mean? (s) (l) (g) (aq)

Back

(s) = solid,

(l) = liquid,

(g) = gas,

(aq) = aqueous = dissolved in water

Front

What number is present when no coefficient or subscript can be seen?

Back

1

Front

What is Photosynthesis?

Back

Plants use light to combine carbon dioxide and water to make glucose and oxygen.

Front

What is happening in the reaction:

2H2O(l) -----electricity-----> 2H2(g) + O2(g)?

Back

This reaction uses electricity to split liquid water into hydrogen gas and oxygen gas.

(This reaction is called "Hydrolysis." "Hydro" means water and "lysis" means to separate or split. H2O is water's formula so in one water molecule there are 2 atoms of Hydrogen and 1 atom of Oxygen (that's a 2:1 ratio). As a result, when Hydrolysis happens, you end up with twice as much Hydrogen then Oxygen!)