|1 Crore+ students have signed up on EduRev. Have you?|
In Castner Kellner cell:
Heating limestone at a temperature of 1070 K we get:
Heating limestone at a temperature of 1070K we get quick lime i.e CaO.
CaCO3 ⇌ CaO (s) + CO2 (s)
Additional Information: Calcium oxide can be produced by the thermal decomposition of materials like limestone or seashells that contain calcium carbonate in a lime kiln.
Aqueous solution of which of the following compounds is used to detect carbon dioxide:
On passing CO2 gas, Ca(OH)2 becomes CaCO3 (milky white ppt.) which proves the presence of CO2.
Passing carbon dioxide through slaked lime gives:
If CO2 is passed through slaked lime(calcium hydroxide Ca(OH)2), it gives out calcium carbonate (CaCO3) also called marble/limestone.
CO2 + Ca(OH)2→ CaCO3+ H2O
Bones and teeth contains:
Additional Information: The hardest part of the human body, teeth mostly consist of a calcified tissue called dentin. The tooth's dentine tissue is covered in enamel, that hard, shiny layer that you brush.
In Castner Kellner cell, electrolyte used is:
In the Castner-Kellner method NaOH is prepared by the electrolysis of an aqueous solution of NaCl(Brine).
Additional Information: The Castner Kellner process is a method of electrolysis of sodium chloride solution to produce alkali hydroxide. It uses electrolytes of NaCl solution graphite anode and mercury cathode.
Milk of lime reacts with chlorine to produce:
Slaked lime (milk of lime) reacts with chlorine gas to produce the bleaching agent calcium hypochlorite – a common form of 'swimming pool' chlorine.
What is washing soda?
Pure NaCl is obtained by the process of:
Crystallization: A chemical solid-liquid separation technique in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs.
The formula of bleaching powder is:
Calcium hypochlorite is an inorganic compound with the formula Ca(OCl)2. It is the main active ingredient of commercial products called bleaching powder.