Acids and Alkalis

• What ions are produced by acids?


  Hydrogen ions (H+)
• what ions are produced in alkalis?


  Hydroxide ions (OH-) are produced in alkalis.
• What is the pH range for acids?


  1-6
• What is the pH range for alkalis?


  8-14
• What is pH for nuteral?


  pH 7
• Hydrogen ions + Hydroxide ion -> 


  water
• what is the pH range for weak acids?


  pH 4-6
• what is the pH range for weak alkalis?


  pH 8-9
• what is a weak acid?


  Only partially ionised and has a low concentration of hydrogen ions.
• what is a weak alkali?


  Only partially ionise in water (aqueous solution)
• what is the pH range for strong acids?


  pH 1-3
• what is the pH range for strong alkalis?


  pH 13-14
• Why is an alkali different to other bases?


  Because it has to dissolve in water.
• An acid has a pH under _ . It also needs _ ions.


  7, H+
• what is the pH scale used for?


  To measure acidity and alkalinity.
• Acid + metal ->


  salt + hydrogen
• Acid + base/alkali -> 


  salt + water
• Acid + metal carbonate ->


  salt + water + carbon dioxide
• Hydrochloric acid + Magnesium ->


  magnesium + hydrogen
• Sulphuric acid + Copper oxide ->


  copper sulfate + water
• Nitric acid + Calcium carbonate ->


  calcium nitrate + water + carbon dioxide
• what products are formed when a metal reacts with an acid?


  salt + hydrogen
• what is an alkali?


  A base that dissolves in water
• what products are formed when a metal hydroxide reacts with an acid?


  salt and water
• Can Aluminium be extracted from its oxide using Carbon?


  No because Aluminium is more reactive than Carbon.