Combination Reactions

11SCI - Chemical Reactions

Finn LeSueur

2020

Mahi Tuatahi

  1. Write down the general reaction for a displacement reaction
  2. What might you observe if a displacement reaction has occurred?
  3. How do you know/how can you predict if a displacement reaction will occur?
  4. A piece of lead is placed into a silver iodide solution. Will a reaction occur?
    • If it will, write a word and symbol equation for it.
  5. A piece of aluminium is placed into a magnesium sulfate solution. Will a reaction occur?
    • If it will, write a word and symbol equation for it.

Ngā Whāinga Ako

  • To describe what happens in a combination reaction.

Combination (Synthesis) Reactions

[ \[\begin{aligned} A + B \longrightarrow AB \end{aligned}\]

]

A reaction, usually combustion, where two ions are combined to form a compound.

Tauria Tahi

A piece of magnesium is burned over a bunsen burner and a white solid is formed.

  1. What is the solid that is formed?
  2. Write a word equation.
  3. Write a symbol equation (with states) and balance it.
  1. magnesium + oxygen gas \(\longrightarrow\) magnesium oxide
  2. \(Mg_{s} + O_{2g} \longrightarrow MgO_{s}\)
  3. \(2Mg_{s} + O_{2g} \longrightarrow 2MgO_{s}\)

Tauria Rua

Hydrogen is collected and combusted using Bunsen burner (pop test).

  1. What is formed in the reaction?
  2. Write a word equation.
  3. Write a symbol equation (with states) and balance it.
  1. hydrogen gas + oxygen gas \(\longrightarrow\) water
  2. \(H_{2g} + O_{2g} \longrightarrow H_{2}O_{g}\)
  3. \(2H_{2g} + O_{2g} \longrightarrow 2H_{2}O_{g}\)