In an experiment, hydrochloric acid reacted with different volumes of sodium
thiosulfate in water. A yellow precipitate was formed during the reaction. A cross
drawn at the base of each flask became gradually invisible due the formation of this
yellow precipitate. The time taken for the cross to become invisible was recorded. A
partial record of the experiment is shown.
Experimental Record
7
Flask Volume of Volume of
Volume of Ti
HCI Sodium Thiosulfate Water
1 10 mL 10 mL
40 ml 14 seconds
10 mL 20 mL
30 mL
3 10 mL 30 mL
20 mL
4 10 mL 40 mL
10 mL
mL
Based on your knowledge of factors that affect the rates of chemical reactions,
predict the trend in the last column of the exnerimental record Ilse comnlete