PLEASE HELP 1. As the solution changes from a pH of 4 to a pH of 1, there is a
A. 1000 fold decrease in H+ ions
B. 3 fold decrease in H+ ions
C. 1000 fold increase in H+ ions
D. 3 fold increase in H+ ions

2. According to the Arrhenius theory, which list of compounds includes only acids?
A. HF, H2CO3, and HNO3
B. LiOH, HNO3, and CH3OH
C. H2PO4, HCO3, and NH4Cl
D. HNO3, H2SO4, and C6H12O6

3. A solution of LiOH is classified as
A. an Arrhenius acid, with a pH above 7
B. an Arrhenius base, with a pH below 7
C. an Arrhenius acid, with a pH below 7
D. an Arrhenius base, with a pH above 7

4. As NH4OH is added to an HCl solution, the pH of the solution
A. decreases as the OH- ion concentration increases
B. increases as the OH- concentration increases
C. increases as the OH- concentration decreases
D. decreases as the OH- concentration decreases