Alexa, the voice service that powers Echo, provides capabilities, or skills, that enable customers to interact with devices in a more intuitive way using voice. Examples of these skills include the ability to play music, answer general questions, set an alarm or timer and more.
1 Water can dissolve salt because the positive part of water molecules attracts the negative chloride ions and the negative part of water molecules attracts the positive sodium ions. 2  The amount of a substance that can dissolve in a liquid (at a particular temperature) is called the solubility of the substance.
Salts. A salt is an ionic compound formed by the reaction between an acid and a base. Salts are strong electrolytes that dissociate completely in water. This dissolution of salts in water often affects the pH of a solution.. NH 4 Cl is the salt formed in the reaction between a strong acid (HCl) and a weak base (NH 3). Only the cation, NH 2 + , will hydrolyze water. NH 4 Cl (s) + H 2 O  NH 4 + (aq) + Cl - (aq). There is a complete dissociation in water, since this is a strongly electrolytic salt.