States of Matter

Chem - Unit 5

Water —> (s), (l), or (g)

• it depends on the temperature

• if it is not indicated and you are forming it as a product: room temp state (l)

Lone Elements

Go with their states at room temp (see periodic table in window)

Compounds

• for single- replacement and double-replacement reactions the compounds will be (aq) unless otherwise noted (very rare occasions

• in synthesis and ddecomposition reactions compounds tend to be solids (unless the substancr is commonly a gas —> ex: CO₂)

• Carbon based compounds in combustion reactions can be (s), (l), or (g) but most often you will be given its state

Activity Series (used for S.R. reactions ONLY)

• If the reaction occurs than the products will be a (s) metal, or halogen (follow rules for hallogens above), and the compounds will be (aq)

• If it does not occur, just write NO REACTION

• If the compound for the reactants is water CHECK THE STATE of water when looking at the activity series

Solubility Rules (used for D.R. reactions ONLY)

• ALL reactants are (aq), unless there is water, which would be (l)

• Products:

  • if soluble they are (aq)

  • if insoluble they are (s)

Other

• if there is a product that does npt fit anywhere above (such as oxygen, carbon dioxide, hydrogen, nitrogen, ect.), think about its state at room temperature, what is it?

Binary Decomposition

Breaks into 2 elements

Metal Chlorate

Breaks into metal chlorate and oxygen

Metal Carbonate

Breaks into the metal oxide + carbon dioxide

Metal Hydroxide

Breaks into the metal oxide + water

Acids

Breaks into water + an acidic oxide