Combustion and Corrosion
What are the reactants in a combustion reaction?
oxygen and fuel/oxides/hydrocarbon
What is the general formula for a neutralization reaction?
acid + base makes what?
acid + base -----> water + ionic compound
What coefficients are needed to balance the following equation? KOH + HBr --> KBr + H2O
No coefficients needed (already balanced)
What is the chemical formula for ammonium hydroxide
NH4OH
What is the name for a compound that releases H+ and an anion when dissolved in water.
Acid
Propane (C3H8) combusts completely in oxygen. What are the products?
CO2, H2O, and energy
Do bases have a high or low pH?
High
Is this equation 2HgO ---->2Hg + O2 balanced?
Yes
Acids react with metals to form what products?
hydrogen gas and an ionic compound
Are acids or bases bitter tasting?
Bases are bitter
Give one real-world example of corrosion (either good or bad)
Rust, copper turning green, galvanizing, aluminum oxide coating, etc
Would a solution with a pH of 1 be a strong acid, weak acid, strong base or weak base?
Strong acid
Is this equation balanced? 2H3PO4 + 6KOH --> 2K3PO4 + 6H2O
Yes.
What would be the products of a reaction between hydrochloric acid and magnesium?
hydrogen gas (H2) and magnesium chloride (MgCl2)
Which of the following is not an acid?
a.HCl b.HF c. NaCl d. H2SO4
NaCl
What are the 4 potential products of an incomplete combustion reaction (aside from energy)?
CO2, CO, C, H2O
What are the chemical formulas for the products of the following neutralization reaction? HCl + Mg(OH)2 → ???
H2O and MgCl2
Give the coefficients to balance the following:
___ H3PO4 + ___ KOH --> ___ K3PO4 + ___ H2O
1, 3, --> 1, 3
What is the chemical formula for phosphoric acid?
H3PO4
Why are acids and bases good conductors of electricity (when dissolved in water?)
They dissociate/break apart into their ions
Balance the following complete combustion reaction:
C7H6O2 + O2 → CO2 + H2O
2C7H6O2 + 15O2 → 14CO2 + 6H2O
Write the full balanced chemical equation for the following neutralization reaction:
H2SO4 + Ba(OH)2 --> ???
H2SO4 + Ba(OH)2 → BaSO4 + 2 H2O
Explain how the Law of Conservation of Mass relates with balancing equations
Matter can be neither created nor destroyed. This means that the number of atoms of each element on either side of the equation must be the same, they are simply rearranged.
What is the difference between a binary acid and an oxyacid?
Binary acids only have two elements: a single anion + hydrogen (can have multiple hydrogens)
Oxyacids have hydrogen and a polyatomic
What is the difference between a strong and weak base?
Strong base: all molecules dissociate into hydroxide and cation
Weak base: only some of the molecules dissociate into their ions