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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro
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What are the properties of bases? Provide some examples of common substances that

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QUESTION:

What are the properties of bases? Provide some examples of common substances that contain bases.

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QUESTION:

What are the properties of bases? Provide some examples of common substances that contain bases.

ANSWER:

Solution:

Step 1

Properties of bases:-

Physical properties of base

  1. They have a bitter taste.
  2. They have slippery touch.
  3. They conduct electrically.
  4. It turns red litmus to blue.
  5. It turns colorless phenolphthalein to pink
  6. Bases conduct an electric current.
  7.  Bases have Usually no smell (except NH3! )
  8. Bases are substances which will restore the original blue color of the most of the acids

Chemical properties of base :-

 REACTION WITH ACIDS:

BASE + ACID SALT + WATER

KOH + HCl  KCl + H2O

NaOH + HCl  NaCl + H2O

Reaction with salt:

FeCl3 + 3NaOH  Fe(OH)3 + 3NaCl

2CrCl3 + 6NaOH  2Cr(OH)3 + 6NaCl

MgCl2 + 2NaOH  Mg(OH)2 + 2NaCl

Reaction with metals:

2Al + 2NaOH + 2H2O  2NaAlO2 + 3H2

Zn + NaOH + H2O  Na2ZnO2 + 2H2

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