What is the hybridisation of silicon in orthosilicate?

Explanation

To determine the hybridization of silicon in orthosilicate (SiO4^4-), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Chemical Formula**:
The formula for orthosilicate is SiO4^4-. This indicates that there is one silicon atom (Si) and four oxygen atoms (O).

**Hint**: Remember that the formula gives you the number of atoms involved in the molecule.
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