Evidence of Reaction $1.$ Barium chloride and $3$ M sulfuric acid $2.$ Sodium chloride and silver nitrate. NaCl$+$ABNO$\_33.$ Sodium chloride and potassium nitrate NaCl$+4.3$ M sodium hydroxide and $6$ M nitric acid. NaOH$+$HNO$\_35.3$ M sodium hydroxide and $6$ M hydrochloric acid NaOH$+$HCl$$

$6.6$ M ammonium hydroxide and $3$ M sulfuric acid.

NH$\_4$OH$+$H$\_2$SO$\_4$

$7.6$ M ammonium hydroxide and iron$($III$)$ chloride.

NH$\_4$OH$+$FeCl$\_3$

$8.$ Ammonium chloride and copper$($II$)$ sulfate

NH$\_4$Cl$+$CuSO$\_4$

$9.$ Zinc nitrate and copper$($II$)$ sulfate

Zn$($NO$\_3)\_2+$CuSO$\_4$

$10.$ Sodium carbonate and calcium chloride. Discussion