This happens because of corrosion of copper , as the copper is exposed to air it reacts slowly with water from the moisture present in air, carbondioxide and oxygen. And the product formed is a mixture of copper hydroxide and copper carbonate as shown below.
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What is Wurtz reaction?
It is the reaction between alkyl halides and sodium in the dry ether to give alkanes with higher number of carbon. 2R-X + 2 Na —> R-R +2NaX
What are the methods of Prepration of ethers?
What will be the volume of water when it is heated from 0 degrees Celsius to 10 degrees Celsius?
According to CHARLES LAW “At constant pressure, The volume of a given mass of a gas increases or decreses by 1/273 of its volume at 0 ͦ degree C for every one degree centigrade rise or fall in temperature”. Vol at 10 = vol at zero + 10 x vol at zero/273
Dalton’s Atomic Theory In 1808 John Dalton published a new system of chemical philosophy in which he propose the following theory :- Matter consist of indivisible atoms. All the atoms of a given element have identical properties. Compounds are formed when atoms of different elements combined in a fixed ratio. Chemical reactions only involve theContinue reading “Atomic Structure”
A Short intro to acid, base and indicators.
Acid base and salts Acids:- these are the substances that Are sour in taste. Turn blue litmus red. Give H+ ions. Can accept a pair of electrons. Base :- These are the substances that Are bitter in taste. Turn red litmus blue. Soapy in touch. Give OH– ions. How to recognise the acid and bases?Continue reading “A Short intro to acid, base and indicators.”