Which of the following ions would have the minimum coagulating value for sol obtained on peptizing `Sn(OH)_(4)` by little `NaOH` solution.
A
`Cl^(-)`
B
`SO_(4)^(2-)`
C
`K^(+)`
D
`Ba^(2+)`
Text Solution
AI Generated Solution
The correct Answer is:
To determine which ion would have the minimum coagulating value for the sol obtained on peptizing Sn(OH)₄ by a little NaOH solution, we can follow these steps:
### Step 1: Understand the Concept of Coagulation
Coagulation refers to the process where colloidal particles aggregate and settle out of the solution. The coagulating value is the minimum concentration of an electrolyte required to cause this coagulation. According to the Hardy-Schulze rule, the coagulating value is inversely related to the charge of the coagulating ion.
### Step 2: Apply the Hardy-Schulze Rule
According to the Hardy-Schulze rule:
- The greater the valency (charge) of the coagulating ion, the lower the coagulating value. This means that ions with higher charges are more effective at causing coagulation.
### Step 3: Identify the Charges of the Ions
In the question, we need to consider the charges of the ions provided. Typically, ions can have charges like:
- +1 (monovalent)
- +2 (divalent)
- -1 (monovalent)
- -2 (divalent)
### Step 4: Determine the Charge of the Colloidal Particles
Since Sn(OH)₄ is a colloidal solution, we need to determine the charge of the sol particles. In this case, the Sn(OH)₄ sol particles are negatively charged when peptized with NaOH.
### Step 5: Select the Appropriate Coagulating Ion
To coagulate negatively charged particles, we need positively charged ions. The effectiveness of these ions in coagulating the sol will depend on their charge:
- A divalent ion (like Ba²⁺) will have a greater coagulating effect than a monovalent ion (like Na⁺).
### Step 6: Conclusion
Among the ions considered, the one with the highest positive charge (Ba²⁺) will have the minimum coagulating value. Therefore, the answer is that the ion with the minimum coagulating value for the sol obtained from peptizing Sn(OH)₄ is **Ba²⁺**.
To determine which ion would have the minimum coagulating value for the sol obtained on peptizing Sn(OH)₄ by a little NaOH solution, we can follow these steps:
### Step 1: Understand the Concept of Coagulation
Coagulation refers to the process where colloidal particles aggregate and settle out of the solution. The coagulating value is the minimum concentration of an electrolyte required to cause this coagulation. According to the Hardy-Schulze rule, the coagulating value is inversely related to the charge of the coagulating ion.
### Step 2: Apply the Hardy-Schulze Rule
According to the Hardy-Schulze rule:
- The greater the valency (charge) of the coagulating ion, the lower the coagulating value. This means that ions with higher charges are more effective at causing coagulation.
...
