Question

ethar dissolved in H2SO4 but not in water...why??

Answer 1

Water is polar in nature while Ether is non-polar. Ethers are very slightly soluble in water at around 6.8g/100g. This is due to the presence of oxygen in ethers which interact with hydrogen in water to produce H-bonding to make it slightly soluble. And this low solubility is what makes a two-phase mixture of water and ether excellent for separation techniques.

But this I am talking about diethyl ether. The solubility of Ether in water also depends on the type of Ether you are using. While the solubility of diethyl ether is very low as mentioned above, tetrahydrofuran is completely soluble. Even 12-crown-4 ether is soluble in water. However, dimethyl ether is not at all soluble in water.

So, as diethyl ether is commonly used and is essentially known as Ether, it is usually known to be slightly soluble in water. But in reality, it depends on the type of Ether you are using.

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Answer 2

Water is polar and ethar is non polar in nature.
Ethar is very slightly dissolve in water this is because of the presence of O2 in ether which interact hydrogen in water to produce H- bonding to make it slightly soluble.