Itiosi's Guide for Science Examination

SCIENCE REVISION FOR YEAR 7

Want to pass your upcoming test or exam on Science?! Take this lesson!!​

Acids are any substance that has H+ as the only positive ion. Bases and alkalis are any substances that have OH- as the only negative ion.

A neutral substance has an equal amount of H+ and OH - ions.​

​Acids and Bases

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Multiple Choice

Test yourself : A neutral substance has both...

• H+

• OH-

• H+ and OH-

• None of the above