### ZIMSEC O Level Combined Science Notes: Experiment: The reaction of metals with dilute acids

• Metals also react with dilute acids such as
• Dilute hydrochloric acid
• Hydrogen gas is released as a by product of the reaction
• Metals such as calcium, magnesium and zinc that react with water react even more vigorously with dilute acids
• Metals that react with the acid dissolve and disappear in the acid
• They form a salt with the acid
• The word equation for these is:
• $\text{metal + acid}\rightarrow\text{salt +hydrogen}$
• If the metals react with sulphuric acid the salts are called sulphates
• If hydrochloric acid reacts with metals to form salts known as chloride
• For example:
• $\text{sodium+hydrochloric acid} \rightarrow\text{sodium chloride (common salt)+hydrogen}$
• $\text{magnesium+hydrochloric acid}\rightarrow\text{magnesium chloride+hydrogen}$
• $\text{magnesium+sulphuric acid}\rightarrow\text{magnesium sulphate+hydrogen}$
• Metals with a high affinity for oxygen also tend to react vigorously and sometimes violently with dilute acids

To access more topics go to the Combined Science Notes page.