Science home work metal


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Science home work metal

  1. 1. Acids in a solution have a pH below7.0, releases hydroxyl ions in water. Acidsare divided into two main classes: (1)Strong acids are very aggressive andcause severe skin burns, examples arehydrochloric acid, nitric acid, and sulfuricacid. (2) Weak acids are mildly aggressiveand normally do not affect skin, examplesare acetic acid (vinegar), citric acid (citrusfruit juice acid), and tartaric acid (usedin making mayonnaise). Also called naturalor organic acids.
  2. 2. • When two or more metals reactsomething new is formed.• When there are two or more atomsbonded it is called a compound.• Metals release hydrogen, H.•The metals react in differentspeeds, some react quicker than othersdue to some metals being more reactivethan others.• They would need energy but depends on what charge it is.• They would have to collide and react for them to make something.
  3. 3. The Reactivity Series This is the reactivity series and it shows which metals reacts most with acid. As you can see Potassium is the most reactive metal in the series and Platinum is the least. Platinum is used for jewellery because of it’s low reactive over many years. Some metals react vigorously with water. Some slowly react but still will have a quite lot of energy to expose. Some metals may react but over a long time like Copper or Gold.
  4. 4. Do all metals react with acids in the same way? lead - the metal reacts very slowly, magnesium - the metalcopper - no bubbles,a reaction with acid iron - the metal reacts slowly, producing no reacts quickly with producing very few bubbles thefew bubblessodium - the metal bursts into flames, lots of bubbles acid, producing a very strong reaction
  5. 5. Metal + Acid Productsmagnesium (Mg) HCL magnesium chloride + hydrogen (MgCl+H)sodium (Na) HCL sodium chloride + hydrogen (NaCl+H)aluminium(Al) HCL aluminium chloride + hydrogen (AlCl+H)iron (Fe) HCL iron chloride + hydrogen (FeCl+H)lead (Pb) HCL lead chloride + hydrogen (PbCl+H)
  6. 6. On the topic of metal reactions in acids, Ihave learnt that a salt and hydrogen areproduced when a metal and an acid react.Also, in class we have done an experimenton metal reactions, in which there weredifferent types of results as the morereactive solutions vigorously fizzed,slightly heated the test tube as well asmaking noises like ‘pop’. Where as, othermetals that aren’t as reactive onlybubbled a tiny bit or did not react at all.
  7. 7. If you add Mg metal to hydrochloric acid , theMg will dissolve and will form bubbles ofhydrogen gas . As a result of the reaction,water vapour will also be released .thehydrogen atoms form H2 gas, they leavebehind Then, the Mg2 will bond with the Cl-ions. Here is the single replacement reactionequation:Mg( + 2 HCl( → MgCl2- + H2
  8. 8. metal + acid → salt + hydrogen metal oxide + acid → a salt + water metal hydroxide + acid → a salt + water These are the reactions youacid + metal carbonate → a salt + water + carbon need to know.dioxideacid + metal hydrogen carbonate → a salt + water +carbon dioxide
  9. 9. byBobby &Manmeet &Sunny