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| We were looking at different substances and trying to classify them as either an acid or a base. |
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| Acids and bases are opposites of each other. Acids have a low pH and bases have a high pH. |
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| We used an indicator to see which substances were acids, neutral or a base. The indicator changed colour when it came in contact with an acid or a base. |
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| We checked our indicator card to see if it was an acid or a base. |
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