SOPH: chem section 8.1 quiz

balance following eqauation : ___ Al + ___ O₂ → ___2Al₂O₃

4Al + 1O₂ → 2Al₂O₃

formula names for : methane

CH4

formula names for : water

H20

formula names for : hydrochloric acid

HCl

List four observations that indicate a chemical reaction has occurred

Heat and light are given off Gas is produced (observe bubbling and fizzing) Color change Formation of a precipitate

formula names for : sulfuric acid

H₂SO₄

List three requirements for a correctly written chemical equations

Must represent known facts Must represent the correct formulas for the reactants and products Must satisfy the Law of Conservation of Mass (balanced)

formula names for : ammonia

NH4

write formula equation from following word equation: sodium bicarbonate + hydrochloric acid → sodium chloride + carbon dioxide + water

NaHCO₃ (s) + HCl (aq) → NaCl (aq) + CO₂ (g) + H2O (l)

Coefficient

Number in front of symbol or formula to balance equation

diatomic elements (7)

O₂ (Oxygen) H₂ (Hydrogen) Cl₂ (Chlorine) N₂ (Nitrogen) F₂ (Fluorine) Br₂ (Bromine) I₂ (Iodine)

Diatomic

elements that in their free uncombined state are always found in pairs

write word equation from formula equation: Na (s) + Cl₂ (s) → NaCl (s)

sodium + chlorine → sodium chloride

write word equation from following sentence : Sodium Bicarbonate reacts with hydrochloric acid to produce sodium chloride, carbon dioxide and water

sodium bicarbonate + hydrochloric acid → sodium chloride + carbon dioxide + water