Ionic Equilibrium
Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
Arrhenius Acid
Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.
Bronsted Lowry Base In Inorganic Chemistry
Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.
![**Question:**
At 25 °C, how many dissociated OH⁻ ions are there in 1293 mL of an aqueous solution whose pH is 1.81?
**Answer:**
*Number of OH⁻ ions:* [ ] ions
**Explanation:**
To find the number of dissociated OH⁻ ions, we can follow these steps:
1. **Determine pOH:**
- Since pH + pOH = 14 (at 25°C), calculate pOH as follows:
\[
\text{pOH} = 14 - \text{pH} = 14 - 1.81 = 12.19
\]
2. **Calculate [OH⁻] Concentration:**
- Use the formula \([OH⁻] = 10^{-\text{pOH}}\):
\[
[OH⁻] = 10^{-12.19}
\]
3. **Find Moles of OH⁻ Ions:**
- Convert 1293 mL to liters:
\[
1293 \, \text{mL} = 1.293 \, \text{L}
\]
- Calculate moles of OH⁻:
\[
\text{Moles of OH⁻} = [OH⁻] \times 1.293 \, \text{L}
\]
4. **Calculate Number of Ions:**
- Use Avogadro's number (\(6.022 \times 10^{23}\) ions/mole) to find the total number of ions:
\[
\text{Number of OH⁻ ions} = \text{Moles of OH⁻} \times 6.022 \times 10^{23}
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Given :
pH = 1.81
Volume of solution = 1293 ml
To find : the number of OH- ions
Strategy : 1st we are going to calculate the concentration of hydroxide ion ( using given pH data)then we will multiply it with volume to calculate number of moles of hydroxide ions and then further we can calculate number of ions of hydroxide ion present in the solution .
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