chemical changes

• what type of ions from when metals react with other substances?

  positive
• what is the reactivity of a metal based on?

  its tendency to form positive ions
• what non-metal is found on the reactivity series of metals?

  carbon
• how do we find most metals?

  found as compounds that require chemical extraction to extract the metal
• how we extract metals less reactive than carbon?

  reduction with carbon
• what is produced when a metal reacts with an acid?

  Salt and hydrogen
• how do u neutralise an acid?

  using a base or alkali
• what are alkalis?

  soluble metal hydroxides
• what are bases?

  insoluble metal hydroxide and metals oxides(they don’t dissolve)
• what is produced when an acid reacts with a metal carbonate?

  Salt, water, and carbon dioxide.
• what is produced when acids and alkalis react?

  salt and water
• what does the salt produced depend on?

  the acid used and the positive ions in the base
• how can u make a soluble salt?

  reacting an acid with solid insoluble substances like metals , metal oxides , hydroxides or cabornates
• briefly explain the scientific process of making a salt

  the solid is added to the acid until no more reacts and the excess solid is filtered of to produce a salt solution
• how do u produce solid salts once filtered as a solution

  crystallise it
• what ions do acids produce?

  H+ ions (hydrogen)
• what ions do alkalis proudce?

  Hydroxide ions (OH-)
• what is the ph scale?

  A scale used to measure the acidity or alkalinity of a substance it goes from 0-14
• how can u measure the ph of an acid or alkali?

  universal indicated or ph probe
• what happens during neutralisation? hydrogen ions react with hydroxide ions to produce water