pH scale

• A solution with a pH value of 7 is considered neutral on the pH scale.
• The pH scale ranges from 0 to 14, where lower values indicate higher acidity and higher values indicate greater alkalinity or basicity.
• ways to test for pH: litmus paper, indicator paper, burette, pH meter

  
• the more alkaline it is, the more it will dissolve in water

  
• neutralisation reaction between an acid and base produces salt + water
• alkaline solutions can be used as cleaning agents
• pH affects the rate of chemical reactions
• acidic solutions are corrosive (eat away at metals)
• bases neutralise acids
• weak acids produce weak bases when they react with strong bases
• stronger bases have higher pH values than weaker ones
• A base is a substance that can neutralize an acid
• info card

  
• the more H+ ions, the lower the pH value
• Red color means its highly acidic and are likely of values 0-1

  
• Acids have a pH of 0–6.5 and alkalis from 7.5–14
• The key to an acid, base or alkali's strength is what happens to it in solution (when dissolved in water)
• • blue to violet indicates alkaline
  • green color indicates neutral , value 7
  • red to yellow indicates acidity

  
• pH stands for potential hydrogen.