White snow-like powder below sodium hydroxide solution
Sodium hydroxide is easily contaminated with sodium carbonate. The free base continuously reacts with atmospheric carbon dioxide to form the salt.When a relatively concentrated solution of NaOH is prepared, sodium carbonate slowly precipitates out as a white gelatinous mass.
a) How long did you expose it to air?
b) What is the expected concentration of the base?
c) What are your electrodes made of?