Question

which reaction type occurs when hydrochloric acid reacts with sodium sulfide?
$2hcl_{aq} + na_2s_{aq} \longrightarrow h_2s_{g} + 2nacl_{aq}$
\bigcirc precipitation reaction
\bigcirc neutralization reaction
\bigcirc gas forming reaction
\bigcirc adverse reaction
\textbf{8} multiple choice 1 point
what is the net ionic equation for a reaction between sodium chloride (nacl) and silver nitrate (agno₃)?
\bigcirc na$_{(aq)}$ + no₃$_{(aq)}$ $\
ightarrow$ nano₃$_{(s)}$
\bigcirc na⁺$_{(aq)}$ + no₃⁻$_{(aq)}$ $\
ightarrow$ nano₃$_{(s)}$
\bigcirc ag⁺$_{(aq)}$ + cl⁻$_{(aq)}$ $\
ightarrow$ agcl$_{(s)}$
\bigcirc ag$_{(aq)}$ + cl$_{(aq)}$ $\
ightarrow$ agcl$_{(s)}$

Explanation:

First Question (Reaction Type of HCl and Na₂S)

Step1: Analyze each reaction type

• Precipitation reaction: Forms a solid precipitate. In \(2HCl_{aq} + Na_2S_{aq}

ightarrow H_2S_g + 2NaCl_{aq}\), no solid precipitate is formed (both products are gas and aqueous), so not precipitation.

• Neutralization reaction: Acid + base → salt + water. Na₂S is not a base (it's a salt of a weak acid and strong base), so not neutralization.
• Gas forming reaction: The product \(H_2S\) is a gas. This reaction produces a gas, so it's a gas forming reaction.
• Adverse reaction: Not a standard chemical reaction type.

Step1: Write the balanced molecular equation

\(NaCl_{aq} + AgNO_{3(aq)}
ightarrow AgCl_{s} + NaNO_{3(aq)}\)

Step2: Write total ionic equation

\(Na^+_{(aq)} + Cl^-_{(aq)} + Ag^+_{(aq)} + NO_3^-_{(aq)}
ightarrow AgCl_{(s)} + Na^+_{(aq)} + NO_3^-_{(aq)}\)

Step3: Cancel spectator ions (\(Na^+\) and \(NO_3^-\))

The net ionic equation is \(Ag^+_{(aq)} + Cl^-_{(aq)}
ightarrow AgCl_{(s)}\)

Answer:

gas forming reaction

Second Question (Net Ionic Equation for NaCl and AgNO₃)