Molarity HCl = .353 mol/L

Trial 1
Sample	1	2	3	4	5
Temp at Decantation	60	50	40.2	30	21.2
Vol. HCl used to reach end	16.50	15.8	14.5	7.4	2.88
Trial 2
Temp at Decantation	61	50	38.0	n/s	22.0
Vol HCl used to reach end	16.50	12.99	14.3	n/s	2.66
Avg Temp	60.50	50	39.10	30.00	21.60
Avg Vol	16.50	14.40	14.4	7.4	2.77
Molarity Tetraborate anion

Calculate the molarity of B4O5(OH)4^2- (tetraborate anion) for each column using the average volme of HCl at the equivalence point and the average molarity of HCl which is : .353 mol/L

Remember that 5.0 mL of the tetraborate solution was titrated.

B4O5(OH)4^2-(aq) + 2 H+(aq) + 3 H2O(l) --> 4 H3BO3(aq)

Also.. how do you calculate Ksp?