What happens when, a) Zinc metal reacts with sodium hydroxide solution. b) Gypsum is heated at 373 K c) Potassium hydroxide reacts with Hydrochloric acid. d) Calcium oxide reacts with water. Write equations for the reactions involved.

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Solution

Dear Student,

$1 . Z n + N a O H \to N a_{2} Z n O_{2} + H_{2} 2 . G y p s u m l o s s e s i t s w a t e r o f c r y s t a l i s a t i o n a n d t u r n s t o C a S O_{4} . \frac{1}{2} H_{2} O 3 . 2 K O H + 2 H C l \to 2 K C l + H_{2} O 4 . C a O + H_{2} O \to C a (O H)_{2}$

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What happens when, a) Zinc metal reacts with sodium hydroxide solution. b) Gypsum is heated at 373 K c) Potassium hydroxide reacts with Hydrochloric acid. d) Calcium oxide reacts with water. Write equations for the reactions involved.

Dear Student, 1. Zn + NaOH →Na2ZnO2 + H22. Gypsum losses its water of crystalisation and turns to CaSO4.12H2O3. 2KOH +2HCl →2KCl +H2O4. CaO + H2O →Ca(OH)2 Regards,

Dear Student,

$1 . Z n + N a O H \to N a_{2} Z n O_{2} + H_{2} 2 . G y p s u m l o s s e s i t s w a t e r o f c r y s t a l i s a t i o n a n d t u r n s t o C a S O_{4} . \frac{1}{2} H_{2} O 3 . 2 K O H + 2 H C l \to 2 K C l + H_{2} O 4 . C a O + H_{2} O \to C a (O H)_{2}$

Regards,