On addition of `1 mL` solution of `10% NaCl` to `10 ml` gold sol in the presence of `0.0250 g` of starch, the coagulation is just prevented. What is the gold number of starch?
Text Solution
Verified by Experts
Amount of starch in `mg` that prevent coagulation by `1mL` of `10%NaCl` solution `=0.025xx1000=25` . Hence, gold number `=25` .
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