Question

Which 2 formulas represent arrhenius acids

1)CH₃COOH and CH₃Ch₂OH
2)HC₂H₃O₂ and H₃PO₄
3)KHCO₃ and KHSO₄
4)NaScn and Na₂S2O₃

Answer 1

H₃PO₄ is an Arrhenius acid.

Step-by-step explanation:

Arrhenius acids are substances that when dissolved in water, produce hydrogen ions (H+). So, we need to identify which formulas represent substances that can dissociate in water to form H+ ions. Let's analyze each option:

1. CH₃COOH and CH₃CH₂OH: Both of these formulas represent organic compounds, but they do not dissociate in water to produce H+ ions. So, they are not Arrhenius acids.
2. HC₂H₃O₂ and H₃PO₄: H₃PO₄ is an acid because it can dissociate in water to produce H+ ions. However, HC₂H₃O₂ is a weak acid and does not dissociate completely. So, only H₃PO₄ is an Arrhenius acid.
3. KHCO₃ and KHSO₄: Both of these compounds contain hydrogen, but they do not dissociate in water to produce H+ ions. Therefore, they are not Arrhenius acids.
4. NaSCN and Na₂S₂O₃: These compounds do not contain hydrogen and do not dissociate in water to produce H+ ions. Hence, they are not Arrhenius acids.

Based on this analysis, option 2) HC₂H₃O₂ and H₃PO₄ is the correct answer as H₃PO₄ is an Arrhenius acid.