Questions and Answers
What are the ions and the correct formula for magnesium oxide?
Mg is Mg^+2, O is O^-2, simplifies to MgO.
Write a balanced equation for the reaction of magnesium and oxygen (O2), including their physical states.
2Mg (s) + O2(g) yields 2MgO (s)
What is the simplest formula for the compound formed from 0.200 mole of Al and 0.600 mole of Cl?
The simplest formula is AlCl3.
Study Notes
Ionic Compounds and Formulas
- Magnesium (Mg) forms a cation Mg²⁺ with a +2 charge, while oxygen (O) forms an anion O²⁻ with a -2 charge.
- Using the switcheroo method for ionic compounds, Mg²⁺ and O²⁻ yields Mg₂O₂, which simplifies to MgO.
Balanced Chemical Equations
- The balanced equation for the reaction between magnesium and oxygen gas (O₂) is:
- 2Mg (s) + O₂ (g) → 2MgO (s)
- The physical states indicated are solid (s) for magnesium and magnesium oxide, and gas (g) for oxygen.
Calculating Simplest Formulas
- To find the simplest formula for a compound given 0.200 moles of aluminum (Al) and 0.600 moles of chlorine (Cl):
- Divide each quantity by the smallest molar amount, which is 0.200 moles.
- This leads to a ratio that helps in determining the simplest formula for Al and Cl.
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Description
Test your knowledge of ionic compounds and reactions in the moles and chemical formulas lab. This quiz covers writing chemical formulas, balancing equations, and understanding the principles of ionic bonds. Perfect for students looking to solidify their chemistry skills!
