Results

Table 1: Hill Reaction in NaCl Solutions (A600)
Time (second)	Change in Absorbance at 600nm
	Tube1 Blank	Tube 2 Control	Tube 3 1% NaCl Solution	Tube 4 2.5% NaCl Solution	Tube 5 5% NaCl Solution	Tube 6 10% NaCl Solution
0	-0.041	0.328	0.273	0.355	0.345	0.396
10	-0.113	0.246	0.171	0.225	0.228	0.271
20	-0.186	0.154	0.061	0.11	0.148	0.134
30	-0.25	0.095	-0.021	-0.006	0.067	0.092
40	-0.307	0.024	-0.095	-0.068	0.084	0.014
50	-0.366	-0.034	-0.153	-0.115	-0.053	-0.044
60	-0.408	-0.084	-0.214	-0.171	-0.086	-0.092

This is the table in our hill reaction lab. DCIP, spinach, buffer and salt is used. the results show blank should have been zero but all the values are negative. Tube 3 through 6 as NaCl concentration increased absorbance decreased. But is it not. Can you please write a conclusion and errors based on the data?