Answer:
C. Weak acid.
Explanation:
- Generally, acids (weak or strong) dissociate to produce hydrogen ions, while bases (weak or strong) dissociate to produce hydroxide ions.
Strong acids ionize completely to produce hydrogen ions.
But, weak bases ionizes partially and gives off hydrogen ions when dissolved in water, they dissociate by a percent depending on the strength of the base.
<em>C. Weak acid.</em>
MgCl2 and H2O
Magnesium chloride and water
The correct combination of <span>theoretical motions of particles with their associated phases is given below:
1) Solid : </span>
oscillation about a fixed point . Because solids do vibrate (atoms/molecules of a solid oscillate around their mean positions)<span>
2) Gas : </span>
translation, vibration, rotation. The gas molecules are free to rotate, oscillate & vibrate. <span>
3) Liquid: </span>
rotation and vibration. The liquid molecules are free to rotate & vibrate.
A more clear pictures (at atomic & molecular level is shown below):