Concept explainers
Interpretation:
The correct formula for the compound chromium (III) sulfate is to be identified.
Concept introduction:
Crisscross method is used for writing the chemical formula of ionic compounds. In this method, first write the chemical symbol and charge of the cation and anion. Shift the positive charge to the subscript of the anion and negative charge to the subscript of the cation.
Answer to Problem 5STP
Option B is the correct answer. The formula of the chromium (III) sulfate is
Explanation of Solution
Reason for correct option:
The correct formula of chromium (III) sulfate is
Reason for incorrect option:
- The formula which is given in option A is incorrect. According to this charge on sulfate ion is -3 and that on Cr is +1 which is not true.
- The formula which is given in option C is incorrect. According to this charge on sulfate ion is 3- and that on Cr is +2 which is not true.
- The formula which is given in option D is incorrect. According to this charge on sulfate ion -1which is not true.
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