Hydrazine (N2H4), a rocket fuel , reacts with oxygen to form nitrogen gas and water vapor. The reaction is represented with the
1 answer:
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Chemical property is the property of the substances that describes the ability of the substance to involve in chemical reactions. Physical property is that which does not change the chemical composition of the substances. The following properties of water that it is transparent and tasteless in its pure form and it freezes at a temperature of are physical properties as they simply indicate the change in physical state without any change in chemical composition of water.
The other two properties that water reacts with halogens to form oxygen gas as one of the products and water decomposes to form hydrogen and oxygen are chemical properties as the chemical composition of water changes in the given reaction.
Therefore the correct answer is b. 1 and 4
Answer: Dissociation constant of the acid is .
Explanation: Assuming the acid to be monoprotic, the reaction follows:
pH of the solution = 6
and we know that
As HA ionizes into its ions in 1 : 1 ratio, hence
As the reaction proceeds, the concentration of acid decreases as it ionizes into its ions, hence the decreases concentration of acid at equilibrium will be:
Dissociation Constant of acid, is given as:
Putting values of in the above equation, we get
Rounding it of to one significant figure, we get