2025 LT 16 Remediation: Types of Reactions; Acid-Base; Redox

Which of the following represents a precipitation reaction?

The reaction between a Bronsted-Lowry acid and a Bronsted-Lowry base is:

Tags

NGSS.HS-PS1-2

What occurs when aqueous solutions of ammonia and vinegar are mixed?

• Oxidation-reduction reaction 

• Sublimation     

• Precipitation

• Bronsted-Lowry acid-base reaction

M⁺ is an unknown metal cation with a +1 charge. A student dissolves the chloride of the unknown metal, MCl, in enough water to make 100.0 mL of solution. The student then mixes the solution with excess AgNO₃  solution, causing AgCl to precipitate. The student collects the precipitate by filtration, dries it, and records the data. During the course of the experiment, which of the following happens to the NO₃^- ions?

• They are oxidized by Cl^- ions    

• They are decomposed by reacting with M⁺ ions  

• They are reduced to NO₂^- ions

• They remain dissolved in the filtrate solution

• Oxidation-reduction, because I₂ is reduced

• Double replacement, because both H and I appear as ions in the products

• Precipitation, because there are only two reactants but there are three products

• Acid-base, because H⁺ ions are produced

Which of the following pairs of solutions would result in a precipitation reaction? (use solubility chart)

• NaNO₃(aq) and K₂CO₃(aq)   

• LiC₂H₃O₂(aq) and NH₄NO₃(aq)  

• HgSO₄(aq) and Rb₂CrO₄(aq)

• Ba(NO₃)₂(aq) and MgSO₄(aq)

The diagrams below represent solutes present in 2 different dilute aqueous solutions before they were mixed. Water molecules are not shown. When the solutions were combined, a precipitation reaction took place. Which of the diagrams below is the best particle representation after the precipitation reaction occurred?

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• 
• 
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• H₂SO₄(g) and H₂O(l)

• H₂O(l) and HSO₄^-(aq)

• H₂SO₄(g) and H₃O(aq)  

• H₂O(l) and H₃O⁺(aq)

Which of the following is the conjugate base of NH₃?

• NH^2-  

• NH₂^-  

• H⁺   

• NH₄⁺

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7