𝐂𝐡𝐞𝐦𝐢𝐬𝐭𝐫𝐲 𝟐-𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬.🧪

• -An indicator is a special chemical that changes to a different colour in an acid or an alkali.
• Acids have a pH less than 7 because they contain more H+ ions than OH- ions
• Alkalis (or bases) have a pH greater than 7 because they contain more OH- ions than H+ ions
• A neutral substance has a pH of 7, which means it contains equal amounts of H+ and OH- ions
• The pH scale measures the concentration of hydrogen ions (H+) in a solution
• Neutral substances are neither acids nor alkalis, so their pH is equal to 7
• Neutral substances are those with a pH of 7
• An acidic substance has a pH lower than 7
• Acidic solutions contain more H+ ions than OH- ions
• Paper chromatography is the separation of mixtures of soluble substances by running a solvent through the mixture on the paper which causes the substance to move at different rates over the paper.
• A solvent is a liquid that dissolves another substance
• The definition of pure is a single substance, with a fixed composition , that does not have anything else mixed with it.
• An impure substance will separate into more than one spot. A pure substance will travel up the paper as just one spot.
• A solute is a substance that is dissolved in a solvent to form a solution.
• The meaning of soluble is when a substance is able to be dissolved.
• Solubility refers to how much of a substance can be dissolved in a given amount of water or other solvent.
• Strong acids and alkalis are more corrosive as they can damage other materials by wearing them away (destroying skin).
• Hazard symbols are used on bottles that contain hazardous chemicals.
• pH stands for potential hydrogen.
• The pH scale ranges from 0 to 14.