Question

Which reaction is occurring in the test tube? Select one: KCl(aq) + AgNO3 (aq) → AgCl(s) + KNO3 (aq) b. Mg(s) + HCl(aq) → MgCl2 (aq) + H2(g) c. HBr (aq) + LiOH(aq) → LiBr(aq) + H2O (1) d. C(s) + O2(g) → CO2(g)

Answer 1

The reaction occurring in the test tube, as matched with the examples provided, is an acid-base neutralization reaction, specifically: HBr(aq) + LiOH(aq) → LiBr(aq) + H2O (l).

Step-by-step explanation:

To determine the reaction occurring in the test tube, compare the provided reactions with the known reaction examples. The correct answer should reflect a reaction that aligns with the provided examples and follows the principles of chemical reaction combination.

Among the provided options, the reaction that matches closely with the example reactions is option c. HBr (aq) + LiOH(aq) → LiBr(aq) + H2O (l). This reaction is a typical acid-base neutralization where an acid reacts with a base to form a salt and water; similar to the examples- HCl(aq) + KOH(aq) → H₂O(l) + KCl(aq) and Mg(OH)₂ (s) + 2HCl(aq) → MgCl₂ (aq) + 2H₂O(l) provided in the reference information.

Answer 2

The reaction occurring in the test tube is (option b). Mg(s) + HCl(aq) → MgCl2 (aq) + H2(g). This reaction involves magnesium reacting with hydrochloric acid to form magnesium chloride and hydrogen gas.

Step-by-step explanation:

The reaction that is occurring in the test tube is (option b). Mg(s) + HCl(aq) → MgCl2 (aq) + H2(g).

The reaction involves magnesium (Mg) reacting with hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and hydrogen gas (H2). This is a classic example of a single displacement reaction where a more reactive metal displaces a less reactive metal from its compound.