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Step 1:: Identify the ions based on the reactions described.
Hence, $\mathrm{SCN}^{-}$ is absent.
a. Carbonate is a strong base and reacts with acids to form carbon dioxide. b. c. d.
Step 2:: Summarize the results.
| $\mathrm{SCN}^{-}$ | A |
| Ion | Present (P) or Absent (A) or Undetermined (U) | | --- | --- |
Final Answer
| $\mathrm{SCN}^{-}$ | A |
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