Question

For questions #14 – 17, write an equation for the reaction of magnesium chloride and sodium oxide to produce magnesium oxide with sodium chloride.
14. Show the formulas of the reactants.

15. Show the formulas of the products.

16. Write the balanced the equation for this reaction.

17. What type of chemical reaction is this? How do you know?

Answer 1

14. $MgCl_{2} + Na_{2}O$

Both are ionic compounds and therefore oxidize to certain states. Mg has an oxidation state of +2, Cl has an oxidation state of -1, Na has an oxidation state of +1, and O has an oxidation state of -2.

15. $MgO + NaCl$

Using the same oxidation states, you write the formulas of your products.

16.  $MgCl_{2} + Na_{2}O -\ \textgreater \ MgO + 2NaCl$

You know that you must have the same number of elemental atoms on one side of the reaction as you do on the other. With this balanced equation, you see that both the left and right sides have 1 Mg, 2 Cl, 2 Na, and 1 O.

As a bonus, you can also add in the states of the compounds:

$MgCl_{2} (aq) + Na_{2}O (aq) -\ \textgreater \ MgO (s) + 2NaCl (aq)$ 

17. This is a double replacement reaction (also called a metathesis reaction, or a double displacement reaction), because one element within one compound basically switches places with the element in the other compound. It is also a precipitation reaction, because a precipitate (MgO) is formed.

Hope this is helpful!

Answer 2

Question No.14:

Answer:

The formulas of reactants: MgCl2 and Na2O.

Explanation:

• There are two reactants in this reaction:
• Magnesium Chloride whose formula is MgCl2. It is present in liquid form. It contains one magnesium atom and 2 chlorine atoms.
• Sodium oxide whose formula is Na2O. It is present in solid form. It contains one sodium atom and 2 oxygen atoms.

Question no. 15

Answer:

The formulas of products are: MgO and NaCl.

Explanation:

Reaction equation:

                               MgCl2 + Na2O → MgO + 2NaCl

Two products are formed:

One product is magnesium oxide which is present in solid form. Its formula is MgO and it contains 1 magnesium atom and one oxygen atom.

The second product is sodium chloride. Two molecules of sodium chloride are produced in this reaction and its formula is NaCl.

Question no 16

Answer:

The balanced chemical equation of this reaction:

                  MgCl2+ Na2O → MgO + 2NaCl

Explanation:

• A balanced chemical reaction means the number of atoms and molecules in reactants should be equal to the number of atoms and molecules of the products.
• In this reaction, 1 molecule of MgCl2 and 1 molecule of Na2O reacts to form one molecule of MgO and 2 molecules of NaCl. All the atoms and molecules are balanced on both sides.

Question no. 17.

Answer:

The type of above reaction is a double replacement reaction.

Explanation:

• This reaction is also known as a double displacement reaction and metathesis reaction.
• In this reaction, one molecule reacted and contributed to form two products. For example, MgCl2 switches to form MgO and NaCl two products.
• In this reaction, MgO is precipitated.