Types of Reactions and Predicting Products

Predicting Products and Types of Reactions

By onlyfor quizzes

Predicting products

I don't care if y'all didn't learn it❤️​

​N/B: It does not matter which product is written first (I think that's what my teacher said).

Types of reactions

There are 8 types of reactions

1. Synthesis reactions

2. Decomposition reactions

3. Single displacement (replacement) reactions

4. Double displacement (replacement) reactions or ionic precipitation reactions​

5. Neutralization reactions

6. Combustion reactions

7. Reversible reactions

8. Oxidation –reduction reactions (Redox reactions)*​

Synthesis (combination) reaction

When two or more reactants combine to form a single product.​

A + B = AB​

decomposition reaction

When a single reactant is broken into two or more products.​

• ​This can be carried out by:

  • ​heating the compound (thermal decomposition)

  • by passing an electric current through the compound in the liquid state or dissolved in aqueous solution (electrolysis).

​AB = A + B

NaCl = Na + Cl​

Single displacement (rePlacement) reaction

​When an element in its free state displaces another element from a compound. A more reactive element always displaces a less reactive element (refer to electrochemical series).

• There are two types:​

  • ​A metal may displace the hydrogen from an acid.

  • A metal may displace another metal from a compound.

Single displacement (replacement) reaction CONT.

Multiple Choice

Using the reactivity series

CuCl₂ + Zn --->

• CuCl2 + Zn

• CuZn + Cl2

• ZnCl + Cu

• None of the above

random

For the previous question there was no subscript on the chloride <3

Multiple Choice

Single Displacement

2Li(s) + 2H₂O(l) --->

• 2Li₂H₂O

• 2Li + 2H₂O

• 2LiOH(aq) + H₂(g)

• None of the above

double displacement (replacement) reaction or ionic precipitation reaction

• ​When two compounds that are in a solution react and there is a displacement in both compounds where each exchange ions to form an insoluble solid and another soluble compound.

• First and last ions go together + inside ions go together​.

​AgNO₃(aq) + NaCl(s) = AgCl(s) + NaNO₃(aq)

neutralization reaction

​When an acid reacts with an alkali (base) and a salt and water forms.

​​2KOH + H₂SO₄ → K₂SO₄ + 2H₂O

​

​

N/B: All alkalis are bases, but not all bases are alkalis.​

Alkalis are soluble, compounds that aren't alkalis but are bases are insoluble​.

​

combustion reactions

• A hydrocarbon (like methane, ethane, propane, and butane) reacts with oxygen gas.​

• This is also called burning.

• ​In order to burn something you need the 3 things in the “fire triangle”:

  1. ​Fuel (hydrocarbon)

  2. Oxygen

  3. Something to ignite the reaction (spark)

combustion reactions Cont

• Products are ALWAYS carbon dioxide and water (although incomplete burning does cause some by-products like carbon monoxide)

C₅H₁₂ + O₂ ---> CO₂ + H₂O​

​

​

reversible reaction

• A reaction which doesn’t achieve completion and the products of the reaction can react to reform the original reactants.​

​AB ---> A + B

A + B ---> AB​

reversible reaction Cont.

• In many reversible reactions, the reaction contains a mixture of reactants and products because it proceeds in both direction at the same time.

• ​Most reactions can only proceed in one direction so they are not reversible.

Oxidation Reduction (Redox) Reactions

During an oxidation-reduction reaction, one reactant is oxidised and the other is reduced.​

​CuCl2 + Zn ---> ZnCl2 + Cu

• Zn was oxidized​ while Cu was reduced.

Some text here about the topic of discussion

Oxidation Reduction (Redox) Reactions Cont.

• ​Zn (zinc) was oxidized as its oxidation number went from neutral (0) in its free (atomic or elemental) state to (+2) in the compound.

• ​Cu was reduced as its oxidation number went from (+2) in the compound to Neutral (0) in its free (atomic or elemental) state.

Some text here about the topic of discussion

Multiple Select

Predict the product and state the type of reaction:

Na(s) + Cl2(g)

• decomposition

• synthesis

• 2NaCl(s)

• 2NaCl₂(s)

Fill in the Blanks

When a single reactant is broken into two or more products.

(one word)

Multiple Select

Predict the product and state the type of reaction:

Al(s) + F₂(g)

• synthesis

• redox

• 2AlF₃(s)

• AlF₂

Multiple Select

How can a single reactant be broken into two or more products?

• heating

• passing an electric current through the

  compound in the liquid state

• dissolved in

  aqueous solution

• electrolysis

Multiple Select

Predict the product and state the type of reaction:

Zn(s) + HCl(aq)

• redox

• synthesis

• single displacement

• ZnCl₂(aq) + H₂(g)

• ZnCl₂(aq) + H(g)

Fill in the Blanks

When two compounds which are in solution react and each exchange ions to

form an insoluble solid and another soluble compound.

(don't put the word reaction)

Multiple Select

Predict the product and state the type of reaction:

H2SO4(aq) + NaOH(aq)

• Na₂SO₄(aq) + 2H₂O(l)

• double displacement

• Na₂SO₄(aq) + H₂O(l)

• Na₂SO₄(s) + H₂O(l)