Synthesis
What is synthesis?
A reaction where 2 or more elements combine to form a compound.
What is Decomposition?
A reaction where a compound breaks down into elements and/or smaller compounds.
What is single replacement?
A reaction where an element and compound react to form a different element and compound.
What is double replacement?
A type of chemical reaction where the positive and negative ions of two ionic compounds switch places to form two new compounds.
What is combustion?
A chemical reaction with oxygen.
What type of bond (ionic or covalent) usually forms during synthesis between a metal and a nonmetal?
Ionic bond
True or False: Decomposition reactions often require energy input like heat, light, or electricity.
True
True or False: A single replacement reaction can occur if the element trying to replace another is less reactive.
False
What is the skeleton formula for double replacement?
AB + CD → AD + CB
True or False: Oxygen is always a reactant in a combustion reaction.
True
Write the balanced equation for hydrogen gas reacting with oxygen gas to form water.
2H₂ + O₂ → 2H₂O
Predict the products of the decomposition of calcium carbonate (CaCO₃).
CaCO₃ → CaO + CO₂
Which metal would replace another in a compound: copper or zinc?
Zinc (it is more reactive than copper)
What is neutralization?
A double replacement chemical reaction between an acid and a base.
What are the products of the complete combustion of a hydrocarbon?
Carbon dioxide and water
Predict the product: Fe + S → ? (then balance the equation)
Fe + S → FeS
Balance this equation: 2H₂O → ?
2H₂O → 2H₂ + O₂
Write the balanced equation for chlorine gas reacting with sodium bromide.
Cl₂ + 2NaBr → 2NaCl + Br₂
Predict the products: NaOH + HCl → ?
NaOH + HCl → NaCl + H₂O.
Predict the products for the combustion of (C₂H₅OH)+3O₂.
C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
In a synthesis reaction, magnesium reacts with oxygen. Write the balanced equation and identify the product.
2Mg + O₂ → 2MgO; product: magnesium oxide
When ammonium dichromate (NH₄)₂Cr₂O₇ decomposes, one of the products is nitrogen gas. Write the full balanced equation.
(NH₄)₂Cr₂O₇ → Cr₂O₃ + N₂ + 4H₂O
Predict the products: Zn + HCl → ?
Zn + 2HCl → ZnCl₂ + H₂
Predict the products: AgNO₃ + NaCl → ?
AgNO₃ + NaCl → AgCl + NaNO₃
What elements did we discuss in class that involve combustion reaction? Then name the products of these elements.
Carbon- CO₂
Hydrogen-H₂O
Sulfur-SO₂
Nitrogen-N₂