Answer: Acidity and basicity, proton concentration, the pH scale. You may have noticed that acidic things tend to taste sour, or that some basic. Since the scale is based on pH values, it is logarithmic, meaning that a change of 1 pH unit .
Explanation: PLEASE MARK ME AS BRAINLIEST
Answer:
becuz they have protien inside them dumy its easy
D - Silicon
This is because Silicon has four electrons as indicated by the group it's in. Chlorine would have 7, Magnesium would have 2, Phosphorous would have 5, and Sulfur would have 6.
Hope this helps!
Keema’s statement is C. a hypothesis.
It is a <em>guess</em> as to why something has happened.
Noticing they are not catching as much fish as they normally do is an <em>observation</em>.
Answer:
<u>The last statement describes the correct inozation of water:</u>
Pure water at 25ºC:
- self-ionizes to form an equilibrium system in which:
![[H_3O^+]=[OH^-]=10^{-7}moles/liter](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%5D%3D%5BOH%5E-%5D%3D10%5E%7B-7%7Dmoles%2Fliter)
Explanation:
It has been proven that <em>pure wate</em>r slightly conducts electricity. This fact, explained by the Arrhenius model of acids, would mean that pure water contains ions.
Since such ions are spontaneoulsy produced by the water molecules, this phenomenum is called <em>self-ionization of water</em>.
The equilibrium equation that represents the self-ionization of water is:
![H_2O(l)+H_2O(l)\rightleftharpoons H_3O^+(aq)+OH^-(aq)](https://tex.z-dn.net/?f=H_2O%28l%29%2BH_2O%28l%29%5Crightleftharpoons%20H_3O%5E%2B%28aq%29%2BOH%5E-%28aq%29)
The expression for the equilibrium constant is:
![Keq=[H_3O^+(aq)][OH^-(aq)]](https://tex.z-dn.net/?f=Keq%3D%5BH_3O%5E%2B%28aq%29%5D%5BOH%5E-%28aq%29%5D)
As per the stoichiometry:
![[H_3O^+(aq)]=[OH^-(aq)]](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%28aq%29%5D%3D%5BOH%5E-%28aq%29%5D)
The equilibrium constant for the self-ionization of water has been determined at several temperatures. At 25ºC it is equal to 1.0×10⁻¹⁴.
Then by solving the equation you can find the concentrations of the ions:
![[H_3O^+(aq)]\cdot [OH^-(aq)]=10^{-14}](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%28aq%29%5D%5Ccdot%20%5BOH%5E-%28aq%29%5D%3D10%5E%7B-14%7D)
![[H_3O^+(aq)]=[OH^-(aq)]=x\\\\x^2=10^{-14}\\\\x=\sqrt{10^{-14}}\\\\x=10^{-7}](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%28aq%29%5D%3D%5BOH%5E-%28aq%29%5D%3Dx%5C%5C%5C%5Cx%5E2%3D10%5E%7B-14%7D%5C%5C%5C%5Cx%3D%5Csqrt%7B10%5E%7B-14%7D%7D%5C%5C%5C%5Cx%3D10%5E%7B-7%7D)
![[H_3O^+(aq)]=[OH^-(aq)]=10^{-7}](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%28aq%29%5D%3D%5BOH%5E-%28aq%29%5D%3D10%5E%7B-7%7D)
Hence, we have proved that pure water self-ionizes to form an equilibrium system in which:
![[H_3O^+]=[OH^-]=10^{-7}moles/liter](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%5D%3D%5BOH%5E-%5D%3D10%5E%7B-7%7Dmoles%2Fliter)