QQuestionChemistry
QuestionChemistry
What is the correct formula for cobalt(2$) carbonate?
A. CoCO^3
B. Co^3(CO3)2
C. Co^2(CO3)3
D. Co(2$)3
E. Co^3CO^3
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Answer
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Step 1:I'll solve this step by step using the guidelines you specified:
Step 2:: Identify the elements involved
- Carbonate is a polyatomic ion with the formula $$CO_{3}^{2-}
- Cobalt (Co) is a transition metal
Step 3:: Determine the charge of cobalt in cobalt(III)
- The charge of the cobalt ion will be $$Co^{3+}
- The Roman numeral (III) indicates the cobalt ion has a charge of + 3
Step 4:: Balance the charges
- Carbonate ion has a charge of $$CO_{3}^{2-}
- We need to find how many CO_{3}^{2 -} ions are needed to balance Co^{3 +}
Step 5:: Calculate the ratio
- One $$Co^{3+}$$ requires 2 carbonate ions to balance the charge
- This means the formula will be Co_{2}(CO_{3})_{3}
Step 6:: Verify the charges
- $$2 \times (+3) = +6
- 3 \times (- 2) = - 6 - Charges balance, confirming the formula
Final Answer
C. Co_{2}(CO_{3})_{3}
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