Which of the following are Arrhenius bases? (a) H3AsO4 (b) Ba(OH)2 (c) HClO (d) KOH
Which of the following are Arrhenius bases? (a) CH3COOH (b) HOH (c) CH3OH (d) H2NNH2
In order to determine whether a substance is an Arrhenius base, we need to check if it produces hydroxide ions (OH-) when dissolved in water.
(a) H3AsO4: H3AsO4 does not contain hydroxide ions, so it is not an Arrhenius base.
(b) Ba(OH)2: Ba(OH)2 dissociates in water to produce Ba2+ ions and 2 OH- ions, so it is an Arrhenius base.
(c) HClO: HClO does not contain hydroxide ions, so it is not an Arrhenius base.
(d) KOH: KOH dissociates in water to produce K+ ions and OH- ions, so it is an Arrhenius base.
Based on this information, the Arrhenius bases in the first set are (b) Ba(OH)2 and (d) KOH.
(a) CH3COOH: CH3COOH does not contain hydroxide ions, so it is not an Arrhenius base.
(b) HOH: HOH (water) can act as an Arrhenius base as it can donate a proton by accepting an H+ ion.
(c) CH3OH: CH3OH does not contain hydroxide ions, so it is not an Arrhenius base.
(d) H2NNH2: H2NNH2 does not contain hydroxide ions, so it is not an Arrhenius base.
Based on this information, the Arrhenius base in the second set is (b) HOH.
To determine which of the given substances are Arrhenius bases, we need to understand what Arrhenius bases are.
Arrhenius bases are substances that, when dissolved in water, increase the concentration of hydroxide ions (OH-) in the solution.
Now let's check each option:
(a) H3AsO4: H3AsO4 is not an Arrhenius base because it does not produce hydroxide ions (OH-) when dissolved in water.
(b) Ba(OH)2: Ba(OH)2 is an Arrhenius base. When it dissolves in water, it dissociates to form barium ions (Ba2+) and hydroxide ions (OH-).
(c) HClO: HClO is not an Arrhenius base. It is an acid called chlorine water, which dissociates in water to form hydronium ions (H3O+), not hydroxide ions.
(d) KOH: KOH is an Arrhenius base. It readily dissociates in water to produce potassium ions (K+) and hydroxide ions (OH-).
In summary, the Arrhenius bases among the options are Ba(OH)2 and KOH.
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Now, let's check the second set of options:
(a) CH3COOH: CH3COOH is not an Arrhenius base. It is a weak acid called acetic acid and, when dissolved in water, it produces hydronium ions (H3O+), not hydroxide ions.
(b) HOH: HOH is not an Arrhenius base. It is simply water itself, which does not produce any hydroxide ions (OH-) when dissolved in water.
(c) CH3OH: CH3OH is not an Arrhenius base. It is an alcohol called methanol and does not produce hydroxide ions when dissolved in water.
(d) H2NNH2: H2NNH2 is not an Arrhenius base. It is a weak base called hydrazine, and when dissolved in water, it reacts with water to produce hydrazinium ions (H3NNH3+) and hydroxide ions (OH-).
In summary, there are no Arrhenius bases among the options provided.
Remember, when determining if a substance is an Arrhenius base, you need to check if it produces hydroxide ions (OH-) when dissolved in water.