Chemistry 2/9 test

Liquid bromine and solid lithium iodide react to form solid lithium bromide and solid iodine.

Br2(aq) + 2LiI(s) --> LiBr(s) + I2(s)

Calcium chloride and sodium carbonate in water solution produce solid calcium carbonate and a water solution of sodium chloride

CaCl2(aq) + Na2(CO3)(aq) --> Ca(CO3)(s) + 2NaCl(aq)

Solid iron reacts with aqueous copper(II) nitrate to produce solid copper and aqueous iron(II) nitrate.

Fe(s) + Cu(NO2)2(aq)--> Cu(s) + Fe(NO2)2(aq)

The elements potassium and bromine to form potassium bromide

K(s) + Br2(aq) --> KBr

Solid lithium reacts with chlorine gas to produce solid lithium chloride

Li (s) + Cl2 (g) --> LiCl (s)

Nitrogen gas reacts with oxygen gas to produce nitrogen dioxide gas

N2(g)+ O2(g) --> NO2 (g)

how are the physical states indicated?

Physical states indicate the exact state (or phase) the compounds are in before and after the reaction. Therefore, we must indicate the physical states of reactants and products when we write the equation for the reaction.

Define chemical reaction.

a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

Where are the reactants and products shown in an equation for a chemical reaction

reactants are on the left/ products are on the right