A small piece of sodium is added to some water containing Universal Indicator solution. Describe what you would see happening.Sodium is a Group 1 element.
Sodium reacts with water according to following reaction.
`2 Na + 2 H_2O ----gt 2 NaOH + H_2`
Sodium reacts highly with water and emits H_2 . The reaction is highly exothermic and you observe rise in temperature. The emitted H_2 will get burnt due to this heat release and burns with a bright flame. Hydrogen can sometimes give away tiny 'pop' sound of explosions.
During the reaction, NaOH is formed and it makes the solution alkaline. Since NaOH is a very strong base, it will make the univaersal indicator turn purple.