Basic Knowledge
What is a chemical reaction?
What is a process where substances (reactants) are transformed into different substances (products)?
A reaction where two reactants combine to form a single product is called?
It is a synthesis reaction.
What is an aqueous solution?
It means it is dissolved in water.
Balance this equation...
N₂(g) + H₂(g) → NH₃(g)
N₂(g) + 3H₂(g) → 2NH₃(g)
In this example of a synthesis reaction, finish the equation. A + B → ?
A + B → AB
What information does a chemical phase give us? ex: (s)
A chemical phase tells us the physical state of a given solution.
What type of reaction consists of two compounds exchanging ions?
What is double replacement?
What does the arrow in a chemical equation mean?
The arrow acts as an equal sign, a one-way reaction, showing the products being made.
Balance this equation...
KClO₃(s) → KCl(s) + O₂(g)
2KClO₃(s) → 2KCl(s) + 3O₂(g)
In a single replacement reaction, Zinc reacts with copper(II) chloride, finish the equation and predict what will be formed. Zn(s) + CuCl2(aq) → ?
Zn(s) + CuCl2(aq) → ZnCl2(aq) + Cu(s) (Zinc will replace copper, forming zinc chloride and copper)
What is a balanced chemical equation?
When a each part of an equation has the same number of each solution or compound on each side
This type of reaction occurs when an atom or ion displaces another in a compound
What is a single displacement reaction?
What are all of the chemical phases?
Solid, Liquid, Gas, Aqueous
Balance the equation...
Fe₂O₃(s) + CO(g) → Fe(s) + CO₂(g)
Fe₂O₃(s) + 3CO(g)→ 2Fe(s) + 3CO₂(g)
In a double replacement reaction, silver nitrate reacts with potassium chloride. Finish the equation and determine what is being formed. AgNO3(aq) + KCl(aq) → ?
AgNO3(aq) + KCl(aq) → AgCl(s) + KNO3(aq) (Silver and potassium will swap, forming silver chloride and potassium nitrate.)
What does the coefficient in a chemical equation represent?
It shows the number of molecules or moles of a substance involved in the reaction.
This reaction involves of substance reacting rapidly with an oxidant, usually oxygen, producing heat and light.
What is a combustion reaction?
What does this mean above an arrow, Δ
It means that the reaction requires heat.
Balance this equation...
CO₂(g) + H₂O(l) → C₆H₁₂O₆(s) + O₂(g)
6CO₂(g) + 6H₂O(l) → C₆H₁₂O₆(s) + 6O₂(g)
In a decomposition reaction Calcium carbonate decomposes with heat. Finish the equation and find what the products will be. CaCO3(s) Δ→ ?
CaCO3(s) Δ→ CaO(s) + CO2(g) (Calcium carbonate will decompose into calcium oxide and carbon dioxide.)
In the equation: 2H₂ + O₂ → 2H₂O, how many total hydrogen atoms are on the reactant side?
There are 4 hydrogen atoms
This type of reaction involves the breaking down of a single compound into two or more products.
Decomposition reaction
What does the (s) mean following sodium sulfate in the example below...
Na2SO4(s)?
The (s) means that Sodium sulfate is solid.
Balance the equation...
Na₂CO₃(s) + HCl(aq) → NaCl(aq) + H₂O(l) + CO₂(g)
Na₂CO₃(s) + 2HCl(aq) → 2NaCl(aq) + H₂O(l) + CO₂(g)
In a combustion reaction Methane (CH4) reacts with oxygen. Finish the equation and find the products. CH4(g) + O2(g) → ?
CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g) (Methane will burn in oxygen, forming carbon dioxide and water.)