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Questions and Answers
What are the ions and the correct formula for magnesium oxide?
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.
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?
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.
Flashcards
What is the formula for magnesium oxide?
What is the formula for magnesium oxide?
Magnesium (Mg) forms a +2 ion (Mg^+2) and oxygen (O) forms a -2 ion (O^-2). These charges cancel out, leading to a simple 1:1 ratio in the formula, resulting in MgO.
What is the balanced equation for the reaction of magnesium and oxygen?
What is the balanced equation for the reaction of magnesium and oxygen?
The balanced equation for the reaction of magnesium (Mg) with oxygen (O2) is 2Mg (s) + O2(g) → 2MgO (s). This equation represents the combination of two magnesium atoms (solid) with one oxygen molecule (gas) to form two molecules of magnesium oxide (solid).
What is the simplest formula for a compound with 0.200 mole of Al and 0.600 mole of Cl?
What is the simplest formula for a compound with 0.200 mole of Al and 0.600 mole of Cl?
The simplest formula for the compound formed from 0.200 mole of Al and 0.600 mole of Cl is AlCl3. This is determined by dividing the moles of each element by the smallest number of moles (0.200 in this case), resulting in a ratio of 1:3, representing one atom of aluminum and three atoms of chlorine.
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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