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When 6xx10^(-5)g of a protective colloid...

When `6xx10^(-5)g` of a protective colloid was added to `20mL` of a standard gold sol, the precipitation of latter was just prevented on addition of `2mL` of `10%NaCl` solution. The gold number of a protective colloid is

A

3

B

`3xx10^(-5)`

C

0.06

D

0.03

Text Solution

AI Generated Solution

To find the gold number of the protective colloid, we will follow these steps: ### Step 1: Convert the mass of protective colloid from grams to milligrams The mass of protective colloid given is \(6 \times 10^{-5} \, \text{g}\). To convert this to milligrams, we use the conversion factor \(1 \, \text{g} = 1000 \, \text{mg}\). \[ \text{Mass in mg} = 6 \times 10^{-5} \, \text{g} \times 1000 \, \text{mg/g} = 6 \times 10^{-2} \, \text{mg} \] ...
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