Question

How do i get rows B-D

order Rate n -Bro,1-t -Hel |Temp. (C) rounded toorder Tria Time , t (s) -1000/t order ! whole # ! calc from 7.94 224.64 riais 22 tials 7.2 trials ?,2 3.52 7.01 For column K, use the "round" function to round the order to the ones place. sround cell,0) The zero tells excel to round to no decimal places 24 26

Answer 1

For trial 1:

Total volume = 10 + 10 + 10 + 10 = 40 mL

[I] = Moles of KI / Total Volume

= 10 mL * 0.01 M of KI / 40 mL

= 0.0025 M

[BrO3] = Moles of KBrO3 / Total Volume

= 10 mL * 0.04 M of KBrO3 / 40 mL

= 0.01 M

[H+] = Moles of HCl / Total Volume

= 10 mL * 0.1 M of HCl / 40 mL

= 0.025 M

Similarly we get the table as shown below for other trials (Row B-D):

Trial	Vol of KI	Vol of KBrO3	Vol of HCl	[I]	[BrO3]	[H+]
1	10	10	10	0.0025	0.01	0.025
2	20	10	10	0.005	0.01	0.025
3	10	20	10	0.0025	0.02	0.025
4	10	10	20	0.0025	0.01	0.05
5	15	10	10	0.00375	0.01	0.025

R = K [I]^x [BrO3]^y [H+]^z

Orders are obtained as:

x = 1.7 ~ 2

y = 2.0 ~ 2

z = 2.26 ~ 2

Rate constant, K as obtained by substituting orders in rate equation as:

K = 1.5 x 10¹⁴