Pemunt is chemically.

Options

A. Hydrated sodium aluminium silcate
B. Sodium hexaphosphate
C. Sodium bicarbonate
D. Calcium hydroxide

Answer

To solve the question "Permut is chemically," we need to identify what permutant is and its chemical composition. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Concept of Hardness in Water
- Water hardness is classified into two types: temporary hardness and permanent hardness.
- Temporary hardness can be removed by boiling, while permanent hardness requires different methods for removal.

**Hint:** Recall the difference between temporary and permanent hardness in water.

### Step 2: Identify the Role of Permutant
- Permutant is a method used to remove permanent hardness from water.
- It specifically targets the hardness caused by calcium and magnesium salts, which are often in the form of sulfates and chlorides.

**Hint:** Think about how different methods can treat water hardness.

### Step 3: Chemical Composition of Permutant
- The chemical composition of permutant is sodium-aluminum silicate.
- The general formula for this compound is Na2Al2Si2O8·xH2O, indicating that it is a hydrated salt.

**Hint:** Remember the formula and structure of sodium-aluminum silicate.

### Step 4: Reaction Involving Permutant
- When permutant is added to water containing calcium chloride (a source of permanent hardness), it reacts to form calcium aluminum silicate and sodium chloride.
- The reaction can be summarized as:
\[ \text{CaCl}_2 + \text{Na}_2\text{Al}_2\text{Si}_2\text{O}_8 \cdot x\text{H}_2\text{O} \rightarrow \text{CaAl}_2\text{Si}_2\text{O}_8 + 2\text{NaCl} + x\text{H}_2\text{O} \]
- This reaction effectively removes calcium ions from the water, thus reducing hardness.

**Hint:** Consider how the reaction changes the composition of the water.

### Step 5: Conclusion
- Based on the above information, we conclude that permutant is chemically a hydrated sodium-aluminum silicate.
- Therefore, the correct answer to the question is **hydrated sodium-aluminum silicate**.

**Final Answer:** The correct option is **hydrated sodium-aluminum silicate**.

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