Base (chemistry)
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A Base or Alkali (in chemistry ) means having a pH (on the pH scale) of more than 7 out of 1-14 (7 being neutral, and less than 7 being acid). It is a substance that can accept protons. A base that is dissolved in water is called an alkali. Bases have these characteristics:
- Bitter taste (opposed to sour taste of acids)
- Slimy, or soapy feel on fingers
- Doesn't react well with acidic substances or substances that you can divide
- Bases turn red litmus paper blue
- If mixed with an acid, bases will reduce the pH value
- Bases are substances that contain metal oxides or hydroxides
- Most bases are solids that are insoluble in water
- Bases which are soluble in water form alkalis (soluble bases)
If touched, it may cause a skin irritation. Gloves should always be worn when handling bases. If skin irritation is encountered, the affected area should be rinsed thoroughly with cold water. If that does not stop the problem, contact medical help as soon as possible.
