KS3 Y7 Acids and Alkalis in Our Daily Lives

Gap-fill exercise.

Name:_________________________Class:___________________Date:__________________

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button if available to get a clue. Note that you will lose points if you ask for hints or clues!
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Our stomach produces an acid called . This makes the pH of our stomach to be between pH and . This acid helps in the of food.

If our stomach produces too much acid we can suffer from and burn.

We can take Milk of which is an to help us remove the acid in our stomach. They are weak alkali of pH about . Once the acid is it is not strong enough to cause alkali problem.

The natural pH of our skin is about

Most soaps that we buy today are and has pH of about or 10
This is for our skin.

We need to keep a slightly so nowadays we have poos, er gels and s that is slightly acidic.

 

 

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