States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
![**Task: Empirical Formulas for Ionic Compounds**
**Problem Statement:**
Write the empirical formula for at least four ionic compounds that could be formed from the following ions:
- \( \text{NH}_4^+ \)
- \( \text{PO}_4^{3-} \)
- \( \text{Fe}^{3+} \)
- \( \text{CH}_3\text{CO}_2^- \)
**Solution:**
To form ionic compounds, we pair cations (positively charged ions) with anions (negatively charged ions) such that the total positive charge equals the total negative charge. Here are possible combinations:
1. **Ammonium Phosphate (\( \text{(NH}_4\text{)}_3\text{PO}_4 \))**
- 3 Ammonium ions (\( \text{NH}_4^+ \)) paired with 1 Phosphate ion (\( \text{PO}_4^{3-} \))
2. **Iron(III) Acetate (\( \text{Fe(CH}_3\text{CO}_2\text{)}_3 \))**
- 1 Iron(III) ion (\( \text{Fe}^{3+} \)) paired with 3 Acetate ions (\( \text{CH}_3\text{CO}_2^- \))
3. **Iron(III) Phosphate (\( \text{FePO}_4 \))**
- 1 Iron(III) ion (\( \text{Fe}^{3+} \)) paired with 1 Phosphate ion (\( \text{PO}_4^{3-} \))
4. **Ammonium Acetate (\( \text{NH}_4\text{CH}_3\text{CO}_2 \))**
- 1 Ammonium ion (\( \text{NH}_4^+ \)) paired with 1 Acetate ion (\( \text{CH}_3\text{CO}_2^- \))
Each formula is balanced such that the total positive and negative charges cancel each other out to form a neutral compound.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6b405991-6b5c-4a2f-b726-55a2f2373c6e%2Fcc6c5496-1a54-47f3-9de5-481abfa3f045%2Fw191us8_processed.jpeg&w=3840&q=75)
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Empirical formula: it can be defined as the simplest whole number ratio of different atoms in the compound.
Ionic compound:
• Ionic compound composed of cation which is positively charged (+charge) and an anion which is negatively charged (-charge).
• Ionic compound are electrically neutral.
• Ionic compound composed of
1) A metal and a non metal eg. AlCl3
2) A metal and a polyatomic anion eg. Mg(NO3)2
3) A polyatomic cation and a non metal eg. NH4Br
4) A polyatomic cation and a polyatomic anion eg NH4NO3
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