What is the pH of a 1.0 x 10-4 M solution

4

Explanation:

pH is the negative logarithm of hydrogen ion concentration in a solution. pH can be mathematically expressed as;

pH = -log(H+)

where H+ is the hydrogen ion concentration.

pH = -log(1.0 x 10-4 M)

pH = -(-4)

pH = 4 (The two minus signs cancelled out, so, the result becomes 4)

Thus, the pH of the solution is 4 (indicating an acidic solution)

8 carbon atoms forming single bonds with 18 hydrogen atoms; a triple bond exists between the third and fourth carbon atom from the right

explanation:

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.