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Examining the effect of acidity and alkalinity on bacteria growth inhibitionFeatured science projectScience project video



Acidic and alkaline solutions of a higher concentration were obs

It was also observed that the acidic solution led to a larger inhibition zone compared to the alkali solution of the same concentration.

Solution used Diameter of the inhibition zone (mm)
  5% 10% 15% 20%
Alkali (Sodium Hydroxide) 10 11 18 23
Acid (Hydrochloric acid) 12 15 21 29

Use the graph below to plot the experimental data recorded in the table above.

 bacteria science project

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Complexity level:
Project cost ($):
Time required:
Preparation will require one day, while observation and recording of data will be carried out over a period of three days
Material availability:
Easily found
Safety concerns:

The bacteria should be destroyed with bleach before it is disposed of. Gloves and protective eyewear must be worn when handling the acid and alkali.