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2015-09-29T14:34:07+05:30

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SALTS OF  STRONG ACID AND WEAK  BASE GIVE ACIDIC SOLUTION.SALTS OF  STRONG BASE AND WEAK ACID FORMS  GIVE ALKALINE SOLUTION.
IRON CHLORIDE IS ACIDIC IN NATURE COZ  IT IS FORMED BY REACTION OF WEAK BASE AND FE(OH)3 AND  A STRONG ACID HCL. THUS  FECL3 
IS ACIDIC IN NATURE .
SODIUM CARBONATE IS BASIC IN NATURE COZ  IT IS MADE UP BY THE REACTION  OF A STRONG BASE  NaOH  AND WEAK ACID CARBONIC ACID.THUS SODIUM CARBONATE IS ALKALINE.
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The solution of Iron Chloride forms Hydrochloric acid, a strong acid and Iron Hydroxide, a weak base. So it is acidic. The opposite happens in Sodium Carbonate. Sodium hydroxide, a strong base and a weak acid, carbonic acid is formed. so it is basic. Thus Explained.
2015-09-29T15:02:55+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Iron chloride is acidic because it is formed by the reaction of a weak base and a strong acid HCl.
Sodium Carbonate solution is made by the reaction of Carbonic acid with NaOH.
Therefore, it is alkaline.
It is because, salts of strong acid and weak base will give an acidic solution us, while the salts of weak acid and srtong base, is fine to give us an alkaline solution, for which Sodium carbonate and Iron chloride is an example, and therefore,
Iron chloride is acidic, while Sodium carbonate is basic.

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