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Which of the following is a strong base?
- a)Potassium hydroxide
- b)Magnesium hydroxide
- c)Ammonium hydroxide
- d)Calcium hydroxide
Correct answer is option 'A'. Can you explain this answer?
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Which of the following is a strong base?a)Potassium hydroxideb)Magnesi...
KOH (aq), or potassium hydroxide, is a strong base. When added to water, it dissociates completely to give mobile ions, including the hydroxide ion which is responsible for the alkaline properties of the substance.
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Which of the following is a strong base?a)Potassium hydroxideb)Magnesi...
Potassium hydroxide (KOH) is a strong base. This is because it dissociates completely in water to produce a high concentration of hydroxide ions, OH-.
Explanation:
- Definition of a base: A base is a substance that can accept or donate a pair of electrons, or one that can donate hydroxide ions (OH-) when dissolved in water. Strong bases completely dissociate in water to produce a high concentration of hydroxide ions.
- Dissociation of potassium hydroxide: When potassium hydroxide is dissolved in water, it completely dissociates into potassium ions (K+) and hydroxide ions (OH-). The equation for this dissociation is:
KOH (aq) → K+ (aq) + OH- (aq)
- Complete dissociation: In the case of potassium hydroxide, all the molecules of KOH break apart into ions when dissolved in water. This means that the concentration of hydroxide ions in the solution is high, making it a strong base.
- Other options:
1. Magnesium hydroxide (Mg(OH)2) is a weak base. It only partially dissociates in water, resulting in a lower concentration of hydroxide ions.
2. Ammonium hydroxide (NH4OH) is also a weak base. It undergoes partial ionization in water, resulting in a lower concentration of hydroxide ions.
3. Calcium hydroxide (Ca(OH)2) is a strong base, similar to potassium hydroxide. It completely dissociates in water to produce a high concentration of hydroxide ions.
- Conclusion: Among the given options, potassium hydroxide is the strongest base because it completely dissociates in water to produce a high concentration of hydroxide ions.
Explanation:
- Definition of a base: A base is a substance that can accept or donate a pair of electrons, or one that can donate hydroxide ions (OH-) when dissolved in water. Strong bases completely dissociate in water to produce a high concentration of hydroxide ions.
- Dissociation of potassium hydroxide: When potassium hydroxide is dissolved in water, it completely dissociates into potassium ions (K+) and hydroxide ions (OH-). The equation for this dissociation is:
KOH (aq) → K+ (aq) + OH- (aq)
- Complete dissociation: In the case of potassium hydroxide, all the molecules of KOH break apart into ions when dissolved in water. This means that the concentration of hydroxide ions in the solution is high, making it a strong base.
- Other options:
1. Magnesium hydroxide (Mg(OH)2) is a weak base. It only partially dissociates in water, resulting in a lower concentration of hydroxide ions.
2. Ammonium hydroxide (NH4OH) is also a weak base. It undergoes partial ionization in water, resulting in a lower concentration of hydroxide ions.
3. Calcium hydroxide (Ca(OH)2) is a strong base, similar to potassium hydroxide. It completely dissociates in water to produce a high concentration of hydroxide ions.
- Conclusion: Among the given options, potassium hydroxide is the strongest base because it completely dissociates in water to produce a high concentration of hydroxide ions.
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Which of the following is a strong base?a)Potassium hydroxideb)Magnesi...
Potassium hydroxide
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Which of the following is a strong base?a)Potassium hydroxideb)Magnesium hydroxidec)Ammonium hydroxided)Calcium hydroxideCorrect answer is option 'A'. Can you explain this answer?
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