27. The unit of volume in the metric system is the liter,
1 answer:
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Explanation:
Initial temperature of the water =
Final temperature of the water =
a) Change in temperature of the water,ΔT =
Change in temperature of the water,ΔT is -2.8°°C.
b) Endothermic reaction : Reaction in which heat absorbed and the temperature if the surrounding is decreased.
Exothermic reaction : Reaction in which heat released and the temperature if the surrounding is increased.
On dissolving silver nitrate in water the temperature of the water decreased 2.8 degree Celsius which means that energy water was absorbed by solid silver nitrate to get dissolve in water. Hence, endothermic reaction.
(f) Mass of silver nitrate = 8.89 g
Moles of silver nitrate =
1 mole of silver nitrate gives 1 mole of silver ion i.e. cation.
Then 0.05229 moles of silver nitrate will give:
silver ions.
0.05229 moles of cations are produced.
1 mole of silver nitrate gives 1 mole of nitrate ion i.e. anion .
Then 0.05229 moles of silver nitrate will give:
nitrate ions.
0.05229 moles of anion are produced.
Answer:
The carbocation intermediate reacts with a nucleophile to form the addition product.
Explanation:
The reaction of benzene with an electrophile is an electrophillic substitution reaction. Here the electrophile replaces hydrogen. There is no formation of carbocation as intermediate in the reaction. Infact there is transition state where the electorphile attacks on benzene ring and at the same time the hydrogen gets removed from the benzene. So a transition carbocation is formed.
The general mechanism is shown in the figure.
i) Attack of the electrophile on the benzene (which is the nucleophile)
ii) The carbocation intermediate loses a proton from the carbon bonded to the electrophile.
iii) the carbocation formation is the rate determining step.
iv) There is no formation of addition product.
Thus the wrong statement is
The carbocation intermediate reacts with a nucleophile to form the addition product.
