The ph of a solution is 7. when acid is added to the solution, the hydronium ion concentration becomes 100 times greater. what is the ph of the new solution? a) 14 b) 9 c) 1 d) 5

Iknow #2 is d. i just need to know why

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

What shape would a molecule with two bound groups and two lone pairs have?