What is a chemical change

2 answers:

5 0

Chemical change. ... a usually irreversible chemicalreaction involving the rearrangement of the atoms of one or more substances and a change in theirchemical properties or composition, resulting in the formation of at least one new substance: The formation of rust on iron is a chemical change.

navik [9.2K]3 years ago

4 0

Isn't a chemical change like something that's not a physical change or physically changed but is something that uses natural chemicals? that's my guess sorry if it's wrong I think I'm wrong though

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The fraction of acetic acid that is dissociated is 0.18

Why?

The chemical equation for the dissociation of acetic acid (HAc) is the following:

HAc(aq) + H₂O(l) ⇄ H₃O⁺(aq) + Ac⁻(aq)

To find the fraction of acetic acid that is in the dissociated form (f), we apply the following equation (Ka for acetic acid is 1.76*10⁻⁵). This equation comes from solving the equation of the equilibrium constant for the dissociated fraction of HAc:

$f=\frac{-Ka+\sqrt{Ka^{2} +4KaC} }{2C} = 0.18$

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