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
