Q
QuestionChemistry

Ca^2 +Ca^2 + and S^2−S^2− Express your answer as a chemical formula.
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Answer

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Step 1:
I'll solve this problem step by step, following the specified LaTeX formatting guidelines:

Step 2:
: Identify the ions

- We have two calcium ions ($$Ca^{2+}$$)
- We have one sulfide ion (S^{2 -})

Step 3:
: Determine the charge balance

- Total negative charge: $$1 \times (-2) = -2
- The sulfide ion has a charge of - 2

Step 4:
: Determine the simplest whole number ratio

- We need to balance the charges to create a neutral compound - The ratio of ions will be such that the total positive and negative charges cancel out

Step 5:
: Write the chemical formula

- Two calcium ions ($$Ca^{2+}$$) will balance one sulfide ion ($$S^{2-}$$)
- The chemical formula will be: CaS

Final Answer

Note: This is calcium sulfide, a simple ionic compound formed by the combination of calcium and sulfide ions.