Determine the amount of `CaCl_(2)` (i = 2.47) dissolved in 2.5 L of water such that its osmotic pressure is 0.75 atm at `27^(@)C`.

Explanation

To determine the amount of \( \text{CaCl}_2 \) (calcium chloride) that must be dissolved in 2.5 L of water to achieve an osmotic pressure of 0.75 atm at 27°C, we can follow these steps:

### Step 1: Convert Temperature to Kelvin
The temperature in Celsius needs to be converted to Kelvin:
\[ T(K) = 27 + 273 = 300 \, K \]

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