Kinetic constant K in oxidation reaction with different pH.

Sample	pH	K (25 °C)/mol L−1 h−1	R (fitting variance)
Cr(OH)3	10	2.74 × 10−5	0.8737
	12.04	4.57 × 10−5	0.9323
	13.86	1.32 × 10−4	0.8529
	6.02	1.31 × 10−4	0.9555
	8.02	2.75 × 10−4	0.9761
CrOOH	10.16	4.11 × 10−4	0.9847
	11.98	5.25 × 10−4	0.9691
	13.38	7.35 × 10−4	0.9565