Chemistry – Stoichiometry - Formulae | e-Consult
Stoichiometry - Formulae (1 questions)
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Diagram: (Imagine a diagram here showing 2+ cations and 2- anions. For example, two large yellow circles representing Na+ and two small blue circles representing Cl-.)
Answer: The chemical formula of the compound is NaCl. This is deduced from the diagram by observing the relative numbers of the ions and their charges. There is one sodium ion (Na+) for every one chloride ion (Cl-) to ensure the overall charge of the compound is neutral. (1 x +1 = 1 and 1 x -1 = -1, so 1 - 1 = 0. Therefore, the formula is NaCl.)