To answer your questions, I would need to know the specific substances or pH values you are comparing. However, I can provide general answers related to acidity, basicity, and the pH scale:
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Which is more acidic?: To determine acidity, you would compare the pH values of specific substances. Lower pH values (below 7) indicate stronger acidity, so the substance with the lower pH is more acidic.
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Which is more basic (alkaline)?: To determine which is more basic, you would compare the pH values again. Higher pH values (above 7) indicate stronger basicity, so the substance with the higher pH is more basic.
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What is the only neutral substance?: Pure water (H₂O) is considered a neutral substance with a pH of exactly 7.
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What is the strongest acid on the pH scale shown above?: The strongest acids have pH values significantly below 0. For example, solutions like hydrochloric acid (HCl) or sulfuric acid (H₂SO₄) can have very low pH values, but the exact answer would depend on the specific substances listed in your scale.
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What is the strongest base on the pH scale shown above?: The strongest bases have pH values significantly above 14. For example, sodium hydroxide (NaOH) or potassium hydroxide (KOH) can reach high pH levels, but again, the exact answer would depend on your scale.
If you provide the specific substances or pH values, I can offer more precise answers!