plz give answer of these 3 questions...
urgent...!!!
Answers
Answer:
a)if it is soluble, it's considered an alkali, but if it's insoluble, it is a base. The solubility rule states that for oxides and hydroxides, most are ... We might be tempted to think that it's not soluble, but we also need to check other sources just to be sure, ... CaO is slightly soluble, so it is considered to be an alkali.
b)Potassium metal reacts very rapidly with water to form a colourless basic solution of potassium hydroxide (KOH) and hydrogen gas (H2). The reaction continues even when the solution becomes basic. The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.
c)Electrolytes are substances which, when dissolved in water, break up into cations (plus-charged ions) and anions (minus-charged ions). We say they ionize. Strong electrolytes ionize completely (100%), while weak electrolytes ionize only partially (usually on the order of 1–10%). That is, the principal species in solution for strong electrolytes are ions, while the principal specie in solution for weak electrolytes is the un-ionized compound itself.
example:HF, HC2H3O2 (acetic acid), H2CO3 (carbonic acid), H3PO4 (phosphoric acid), and many more