1. Acids taste sour, give off hydrogen ions, are corrosive, and turn litmus paper red.
2. feel slippery, good for stripping oil and dirt off of human body, turn litmus paper blue, and taste bitter.
3. You can determine whether a substance is an acid or a base by submerging the strip into the substance and if it is blue it is a base and if it is red it is an acid and if it is neither it is water.
4. You can tell by the taste. An acid tastes sour. An example of this would be a lemon b/c lemons are both sour and acidic.
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