How many grams of potassium bromide (KBr) be added to 1 L of 0.05 M solution of silver nitrate just to start the precipitation of silver bromide ?

Explanation

To determine how many grams of potassium bromide (KBr) need to be added to 1 L of a 0.05 M solution of silver nitrate (AgNO3) just to start the precipitation of silver bromide (AgBr), we can follow these steps:

### Step 1: Understand the Reaction
When potassium bromide (KBr) is added to silver nitrate (AgNO3), the following precipitation reaction occurs:
\[ \text{Ag}^+ (aq) + \text{Br}^- (aq) \rightarrow \text{AgBr} (s) \]

### Step 2: Identify the Ion Concentrations
The concentration of Ag\(^+\) ions in the solution is given by the concentration of AgNO3, which is 0.05 M. Therefore:
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