Chemistry Ch. 8
Balance the following and classify each of them: Al(s) + Cl₂(g) → AlCl₃(s). Rxn Type: ? Number of Coefficients: ?
Answer: 2 Al(s) + 3 Cl₂(g) →2 AlCl₃(s) Aluminum + Chlorine= Aluminum Chloride Rxn Type: Combination/Synthesis Number of Coefficients: 7
Name the symbols: (s) (l) (g) (aq)
Answer: (s) = Solid (l) = Liquid (g) = Gas (aq) = Aqueous (Meaning Dissolved in H₂O)
Balance the following and classify each of them: AlN(s) → Al(s) + N₂(g). Rxn Type: ? Number of Coefficients: ?
Answer: 2 AlN(s) → 2 Al(s) + N₂(g) Aluminum Nitride → Aluminum + Nitrogen Rxn Type: Decomposition Number of Coefficients: 5
Balance and classify the following: H₂O₂→H₂O+O₂.
Answer: 2 H₂O₂→ 2 H₂O+O₂ Decomposition
Balance the following equation and what is the sum of the balancing coefficients: KClO₃ → KCl + O₂ Also name the compounds in the reaction
Answer: 2 KClO₃ → 2 KCl + 3 O₂ 7 balancing coefficients Potassium Chlorate → Potassium Chloride + Oxygen
Balance and classify the following: Na+H₂O→NaOH+H₂.
Answer: 2 Na+2 H₂O→2 NaOH+H₂ Single Displacement
Balance and classify the following: SO₂+O₂→SO₃.
Answer: 2 SO₂+O₂→2 SO₃ Combination/Synthesis
Balance and classify the following: K₃PO₄ + BaCl₂ → KCl + Ba₃(PO₄)₂.
Answer: 2K₃PO₄ + 3 BaCl₂ → 6 KCl + Ba₃(PO₄)₂ Double Displacement
Balance the following: Cr + O₂ → Cr₂O₃. Rxn Type: ? Number of Coefficients: ?
Answer: 4 Cr + 3 O₂ → 2 Cr₂O₃ Rxn Type: Combination/Synthesis Number of Coefficients: 9
Using A,B, or C show a model of Combination/Synthesis Rxn Type.
Answer: A+B=C C= New CMPD A+B= Elements or CMPD's (2 Reactants, 1 Product)
Using A,B, or C show a model of Single Displacement Rxn Type.
Answer: A+BC→AC+B A&B= Elements AC&BC= CMPD's
Using A,B, or C show a model of Double Displacement Rxn Type.
Answer: AB+CD→AD+BC AB & CD exchange partners with AD & BC
Using A,B, or C show a model of Decomposition Rxn Type.
Answer: AB→A+B AB= CMPD A+B= Elements or simpler CMPD's
Balance and classify the following: Ba(ClO₃)₂→BaCl₂+O₂.
Answer: Ba(ClO₃)₂→BaCl₂+3 O₂. Decomposition
Balance the following and classify each of them: BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s) + NaCl(aq). Rxn Type: ? Number of Coefficients: ?
Answer: BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s) + 2 NaCl(aq) Barium Chloride + Sodium Sulfate → Barium Sulfate + Sodium Chloride Rxn Type: Double Displacement Number of Coefficients: 5
Balance and classify the following: Bi₂S₃+HCl→BiCl₃+H₂S.
Answer: Bi₂S₃+6 HCl→2 BiCl₃+3 H₂S Double Displacement
Balance and classify the following: H₂+Br₂→HBr.
Answer: H₂+Br₂→2HBr Combination/Synthesis
Balance the following: H₂SO₄ + KOH → H₂O + K₂SO₄. Rxn Type: ? Number of Coefficients: ?
Answer: H₂SO₄ + 2 KOH → 2 H₂O + K₂SO₄ Rxn Type: Double Displacement Number of Coefficients: 6
Order of Balancing 1. ? 2. ? 3. ? 4. ?
Answer: Order of Balancing 1. Metal 2. Polyatomic Ion 3. Hydrogen 4. Oxygen
Balance the following: C₂H₂(g) + O₂(g) → CO₂(g) + H₂O(I). Rxn Type: ? Number of Coefficients: ?
Answer: 2 C₂H₂(g) + 5 O₂(g) → 4 CO₂(g) + 2 H₂O(I) Rxn Type: Combustion Number of Coefficients: 13
Balance the following and classify each of them: Fe₂O₃(s) + Al(s) → Al₂O₃(s) + Fe(s). Rxn Type: ? Number of Coefficients: ?
Answer: Fe₂O₃(s) + 2 Al(s) → Al₂O₃(s) + 2 Fe(s) Iron(III)Oxide + Aluminum → Aluminum Oxide + Iron Rxn Type: Sing Displacement Number of Coefficients: 6
Balance the following equation and name the reaction type: Na₂CO₃ + CaCl₂ → NaCl + CaCO₃ Also name each compound in the reaction
Answer: Na₂CO₃ + CaCl₂ → 2 NaCl + CaCO₃ Double Displacement Sodium Carbonate + Calcium Chloride → Sodium Chloride + Calcium Carbonate
A 3.5g sample of neon gas contains how many atoms of neon?
Answer: 2.1x10²⁴ atoms of Ne
What is the percent by mass of Hydrogen in HC₂H₃O₂? Also name the acid
Answer: 6.714% Hydrogen Acetic Acid
Need more practice? Do problems 23-29 and 32 and 33 in the book on pg 188.
Batman layed an egg
On Pg 164 in the book do word Problems 39.a,c,
Bitch do i look like a typewriter
On Pg 164 in the book do word Problems 10.a,c,
Didddly Dick
List all 7 Diatomic elements and write each of them by themselves.
Hydrogen (H₂) Nitrogen (N₂) Oxygen (O₂) Fluorine (F₂) Chlorine (Cl₂) Bromine (Br₂) Iodine (I₂)
Balance and classify the following: P₄O₁₀ + HClO₄ → Cl₂O₇ + H₃PO₄.
P₄O₁₀ + 12 HClO₄ → 6 Cl₂O₇ + 4 H₃PO₄ Double Displacement
Explain a model of Combustion Rxn Type.
When it reacts with oxygen gas to form something using heat.
When is an equation balanced?
When there is a equal number of an element on both reactant side and the product side of the problem.