Chap 8 SG Flashcards
What is the formula for oxygen by itself in a chemical reaction?
O2
What is the last step in balancing a chemical equation? After the first steps in writing the equation, what is the next step in balancing the equation?
Having the same number of each kind of atom in the reactants and products
Adjusting coefficients to smallest whole number ratio
What is the symbol for a substance in water solution?
(aq)
When a solid produced by a chemical reaction separates from the solution it is called a what?
precipitate
What is the general equation for a decomposition reaction? A synthesis (combination) reaction?
Decomp- AX > A +X Syn- A + X > AX
In what kind of reaction does one element replace a similar element in a compound?
Displacement (single) reaction
Define decomposition reaction.
A reaction in which a single compound breaks down to form two or more simpler substances
In what kind of reaction do the ions of two compounds exchange places in aqueous solution to form two new compounds?
Double displacement reaction
When heated, what do metallic chlorates decompose into?
Metal chloride and oxygen
Some acids, like carbonic acid, decompose into what?
A nonmetal oxide and water
An active metal and a halogen react to form a what?
salt
Group 1 metals react with water to produce metal hydroxides and what other product?
Hydrogen
When balancing a chemical equation, why must the formula subscripts remain unchanged?
Changing the subscript in a formula changes the chemical composition of the compound
What does a metal oxide reacting with water produce?
Calcium hydroxide (the reverse is a decomposition reaction)
When an active metal reacts with water, what are the products?
Metal hydroxide and hydrogen (single-displacement)
