Question

1. phosphoric acid (h₃po₄) is a weak acid primarily because it... options: creates multiple different ions, does not dissociate completely in solution, is made of more than two atoms, gives up to three protons to a solution

Explanation:

Phosphoric acid ($\ce{H_3PO_4}$) is a triprotic acid, meaning it can donate up to three protons ($\ce{H^+}$) in solution. Let's analyze the options:

• "creates multiple different ions": Many acids create multiple ions, not specific to weak or phosphoric.
• "does not dissociate completely in solution": While phosphoric is a weak acid (doesn't dissociate completely), the key characteristic of a triprotic acid (which phosphoric is) is donating up to three protons. Also, the question seems to focus on the "tri" aspect (since it's $\ce{H_3PO_4}$ with 3 H's), so the "gives up to three protons" is more specific to its nature here.
• "is made of more than two atoms": Many acids have more than two atoms, not a defining feature for its acidity type.
• "gives up to three protons to a solution": Phosphoric acid has three ionizable hydrogens, so it can donate up to three protons as it dissociates in steps ($\ce{H_3PO_4 <=> H^+ + H_2PO_4^-}$; $\ce{H_2PO_4^- <=> H^+ + HPO_4^{2-}}$; $\ce{HPO_4^{2-} <=> H^+ + PO_4^{3-}}$). This is a key property of phosphoric acid (a triprotic acid), and this option directly relates to the number of protons it can donate, which is a defining feature of its acidic behavior.

Answer:

gives up to three protons to a solution