Question

Question 7
Balance the following the chemical equation:

MgO + CaS → MgS + CaO

Blank 1:
Blank 2:
Blank 3:
Blank 4:

Answer 1

To balance the chemical equation \( \text{MgO} + \text{CaS} \rightarrow \text{MgS} + \text{CaO} \), let's look at the elements involved:

1. Magnesium (Mg)
2. Oxygen (O)
3. Calcium (Ca)
4. Sulfur (S)

The unbalanced equation is:

\[ \text{MgO} + \text{CaS} \rightarrow \text{MgS} + \text{CaO} \]

Now let's balance it step by step:

1. **Count the atoms of each element on both sides:**

- Left Side:
- Mg: 1
- O: 1
- Ca: 1
- S: 1

- Right Side:
- Mg: 1
- S: 1
- Ca: 1
- O: 1

2. **Since each element has the same number of atoms on both sides, the equation is already balanced as is.**

Thus, you can fill in the blanks with the coefficients of 1 for each substance.

Blank 1: 1
Blank 2: 1
Blank 3: 1
Blank 4: 1

So the balanced equation is:

\[ 1 \text{ MgO} + 1 \text{ CaS} \rightarrow 1 \text{ MgS} + 1 \text{ CaO} \]

Note: In many cases, coefficients of 1 are often omitted in writing balanced equations, so it's perfectly fine to write just:

\[ \text{MgO} + \text{CaS} \rightarrow \text{MgS} + \text{CaO} \]