Science Homework Help

Science Homework Help. Which of the following mixtures would NOT be described as a buffer solution?

0.20 M NaOH and 0.40 M CH3COOH

0.25 M HNO3 and 0.15 M KNO3
0.25 M HNO2 and 0.15 M KNO2
0.15 M NH4Cl and 0.25 M NH3
0.30 M NH3 and 0.15 M HCl

I am stuck on Homework please help due in 15 minutes. 

Science Homework Help

 
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