Arrange the following in the increasing order of acidic strength
(i) `FSO_(3)H` (ii) `HCO_(3)^(-)` (iii) `H_(2)O` (iv) `HSO_(4)^(-)`

Explanation

To arrange the given compounds in the increasing order of acidic strength, we need to analyze the stability of their conjugate bases. The more stable the conjugate base, the stronger the acid. Here are the steps to solve the problem:

### Step 1: Identify the Compounds and Their Conjugate Bases
The compounds we need to analyze are:
1. `FSO₃H` (Fluorosulfonic acid)
2. `HCO₃⁻` (Bicarbonate ion)
3. `H₂O` (Water)
4. `HSO₄⁻` (Hydrogen sulfate ion)
...