Advertisements
Advertisements
प्रश्न
What do you see when sodium hydroxide solution is added to zinc sulphate solution, till it is in excess?
Advertisements
उत्तर
When sodium hydroxide solution is added to zinc sulphate solution, till it is in excess whi te gelatinous precipi tates of Zn (OH)2 are formed and due to the excess of sodium hydroxide these ppt. get dissolved immidiately :
\[\ce{ZnSO4 + 2NaOH ->\underset{\text{white gelatinous ppt.}}{Zn(OH)2 + Na2SO4}}\]
\[\ce{Zn(OH)2 + 2NaOH ->\underset{\text{colourless}}{Na2ZnO2} + 2H2O}\]
APPEARS IN
संबंधित प्रश्न
Choose the most appropriate answer from the following list of oxides which fit the description.
[SO2, SiO2, Al2O3, MgO, CO, Na2O]
An oxide which dissolves in water forming an acid
Name a metallic oxide soluble in excess of caustic soda solution.
Name a weak alkali.
Name a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
What do you observe when caustic soda solution is added to the following solution: first a little and then in excess : CuSO4
Give two examples of amphoteric hydroxides.
Name: A strong alkali
Why the alkali is added drop by drop to the salt solution?
State your observation when zinc chloride solution, zinc nitrate solution, and zinc sulphate solutions are added individually to barium chloride solution.
Write balanced equations for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
