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Answer:
A cation is a positively charged ion, with fewer electrons than protons, while an anion is negatively charged, with more electrons than protons. Because of their opposite electric charges, cations and anions attract each other and readily form ionic compounds.
Explanation:
its science
The dissociation constant is 2.44 mM.
<u>Explanation:</u>
Dissociation constant of any acid or any kind of solutions is the measure of amount dissolved in the solution or separated into different elements. So it is calculated as the ratio of product of concentration of dissociated elements to the concentration of the original compound.
Here the concentration of the acid [HA] = 0.035 M, the pH of the acid is given as 4.67.
![pH=-log[H^{+}]](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%7B%2B%7D%5D)
![[H^{+}]=e^{-pH} = \frac{1}{e^{pH} } = \frac{1}{e^{4.67} } =\frac{1}{107}](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%3De%5E%7B-pH%7D%20%3D%20%5Cfrac%7B1%7D%7Be%5E%7BpH%7D%20%7D%20%3D%20%5Cfrac%7B1%7D%7Be%5E%7B4.67%7D%20%7D%20%3D%5Cfrac%7B1%7D%7B107%7D)
![[H^{+}]=9.35 \times 10^{-3} M](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%3D9.35%20%5Ctimes%2010%5E%7B-3%7D%20%20M)
Then, ![K_{a} =\frac{[H^{+}][A^{-}] }{[HA]} =\frac{(9.35 \times 10^{-3}) ^{2} }{0.035}\\ \\K_{a} = 2497.78 \times 10^{-6}](https://tex.z-dn.net/?f=K_%7Ba%7D%20%3D%5Cfrac%7B%5BH%5E%7B%2B%7D%5D%5BA%5E%7B-%7D%5D%20%7D%7B%5BHA%5D%7D%20%3D%5Cfrac%7B%289.35%20%5Ctimes%2010%5E%7B-3%7D%29%20%5E%7B2%7D%20%7D%7B0.035%7D%5C%5C%20%5C%5CK_%7Ba%7D%20%3D%202497.78%20%5Ctimes%2010%5E%7B-6%7D)
Thus, the dissociation constant is 2.44 mM.
Answer:
Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.