Substrand · Mixtures, elements and compounds · Integrated Science · Grade 7
Free CBE Grade 7 Integrated Science notes and lessons for Acids, bases and indicators, in the Mixtures, elements and compounds strand.
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1. **Acids** Acids are substances that produce hydrogen ions (H⁺) when dissolved in water. **Characteristics of acids** - Most have a sour taste. - Have a pH below 7. - Turn blue litmus paper red. - Some react with metals to produce hydrogen gas. - Some are…
# pH SCALE AND pH CHART ### Meaning of pH pH is a measure of how acidic, neutral or alkaline a solution is. The pH scale ranges from **0 to 14**. ### Categories of the pH Scale 1. **Acidic solutions:** Have a pH below 7. 2. **Neutral solutions:** Have a pH of…
# PROPERTIES OF ACIDS ## Investigating the Reaction of Dilute Acids with Metals ### Aim To investigate how different metals react with dilute acids and identify the gas produced. ### Requirements - Four test tubes - Test tube rack - Eight splints - Box of…
# PROPERTIES OF BASES ### Meaning of Bases A base is a substance that reacts with an acid to produce salt and water only. - Most metallic oxides and metallic hydroxides have basic properties. - Some bases dissolve in water, while others do not. - Bases that…
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