(Solved): 2. (13\%) Determine the concentration of a solution prepared by diluting \( 20.0 \mathrm{~mL} \) of ...

2. (13\%) Determine the concentration of a solution prepared by diluting \( 20.0 \mathrm{~mL} \) of a \( 0.200 \mathrm{M} \mathrm{NaCl} \) to \( 250.0 \mathrm{~mL} \), and express your answer to the correct number of significant figures. 3. \( (13 \%) \) Complete and balance the following acid-base equation: \[ \mathrm{HCl}(\mathrm{aq})+\mathrm{Ba}(\mathrm{OH})_{2}(\mathrm{ag}) \ldots \] 4. \( (13 \%) \) Identify the spectator ions in the following chemical reaction. \[ \mathrm{KBr}(\mathrm{aq})+\mathrm{AgNO}_{3}(\mathrm{aq}) \rightarrow \mathrm{AgBr}(\mathrm{s})+\mathrm{KNO}_{3}(\mathrm{aq}) \]