5,0/- (aq) + 2H+ (aq) + H. O(l) + SO, (g) + S(s)
4. Design an experiment between 1.0 mol dm sodium thiosulfate
and 1.0 mol dm hydrochloric acid to achieve a color change
from colorless to yellow in 60 seconds exactly. You are permitted
to change any variable to achieve this outcome. You could use the
following points for guidance. [10]

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles