18 loose plug of cotton wool
dilute hydrochloric acid
.
Db
o a
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magnesium ribbon
Fiqure 6
The word equation for the reaction between magnesium and dilute hydrochloric acid is
magnesium + hydrochloric acid magnesium chloride + hydrogen
The reaction was carried out using the apparatus shown in Figure 6.
A strip of magnesium ribbon was placed in the conical flask.
100 cm3 of dilute hydrochloric acid was added to the conical flask.
The mass of the flask and contents was measured at regular intervals.
The loss in mass was calculated.
Figure 7 shows a graph of the results.
Name the apparatus that could be used to measure out 100 cm3 of dilute hydrochloric acid. *
(1 Point)

Oh nskskakaaka

The answer is c. 320 g

Answer : option c) heat is released during the process.explanation :

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.