2. Acids in a solution have a pH below
7.0, releases hydroxyl ions in water. Acids
are divided into two main classes: (1)
Strong acids are very aggressive and
cause severe skin burns, examples are
hydrochloric acid, nitric acid, and sulfuric
acid. (2) Weak acids are mildly aggressive
and normally do not affect skin, examples
are acetic acid (vinegar), citric acid (citrus
fruit juice acid), and tartaric acid (used
in making mayonnaise). Also called natural
or organic acids.
3. • When two or more metals react
something new is formed.
• When there are two or more atoms
bonded it is called a compound.
• Metals release hydrogen, H.
•The metals react in different
speeds, some react quicker than others
due to some metals being more reactive
than others.
• They would need energy but
depends on what charge it is.
• They would have to collide and
react for them to make
something.
4. 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.
5.
6. 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 bubbles
sodium - the metal bursts into flames, lots of bubbles
acid, producing a very strong reaction
7. Metal + Acid Products
magnesium (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)
8. On the topic of metal reactions in acids, I
have learnt that a salt and hydrogen are
produced when a metal and an acid react.
Also, in class we have done an experiment
on metal reactions, in which there were
different types of results as the more
reactive solutions vigorously fizzed,
slightly heated the test tube as well as
making noises like ‘pop’. Where as, other
metals that aren’t as reactive only
bubbled a tiny bit or did not react at all.
9. If you add Mg metal to hydrochloric acid , the
Mg will dissolve and will form bubbles of
hydrogen gas . As a result of the reaction,
water vapour will also be released .the
hydrogen atoms form H2 gas, they leave
behind Then, the Mg2 will bond with the Cl-
ions. Here is the single replacement reaction
equation:
Mg( + 2 HCl( → MgCl2- + H2
10. metal + acid → salt + hydrogen
metal oxide + acid → a salt + water
metal hydroxide + acid → a salt + water These are the
reactions you
acid + metal carbonate → a salt + water + carbon need to know.
dioxide
acid + metal hydrogen carbonate → a salt + water +
carbon dioxide
