Question

About half of the hydrochloric acid produced annually in the United States ( 3.0 billion pounds) is used in metal pickling. This process involves the removal of metal oxide layers from metal surfaces to prepare them for coating. (a) Write the overall and net ionic equations for the reaction between iron(III) oxide, which represents the rust layer over iron, and HCl . Identify the Brønsted acid and base. (b) Hydrochloric acid is also used to remove scale (which is mostly $\mathrm{CaCO}_3$ ) from water pipes (see Chemistry in Action essay "An Undesirable Precipitation Reaction" in Section 4.2). Hydrochloric acid reacts with calcium carbonate in two stages; the first stage forms the bicarbonate ion, which then reacts further to form carbon dioxide. Write equations for these two stages and for the overall reaction. (c) Hydrochloric acid is used to recover oil from the ground. It dissolves rocks (often $\mathrm{CaCO}_3$ ) so that the oil can flow more easily. In one process, a $15 \%$ (by mass) HCl solution is injected into an oil well to dissolve the rocks. If the density of the acid solution is $1.073 \mathrm{~g} / \mathrm{mL}$, what is the pH of the solution?

   About half of the hydrochloric acid produced annually in the United States ( 3.0 billion pounds) is used in metal pickling. This process involves the removal of metal oxide layers from metal surfaces to prepare them for coating. (a) Write the overall and net ionic equations for the reaction between iron(III) oxide, which represents the rust layer over iron, and HCl . Identify the Brønsted acid and base. (b) Hydrochloric acid is also used to remove scale (which is mostly $\mathrm{CaCO}_3$ ) from water pipes (see Chemistry in Action essay "An Undesirable Precipitation Reaction" in Section 4.2). Hydrochloric acid reacts with calcium carbonate in two stages; the first stage forms the bicarbonate ion, which then reacts further to form carbon dioxide. Write equations for these two stages and for the overall reaction. (c) Hydrochloric acid is used to recover oil from the ground. It dissolves rocks (often $\mathrm{CaCO}_3$ ) so that the oil can flow more easily. In one process, a $15 \%$ (by mass) HCl solution is injected into an oil well to dissolve the rocks. If the density of the acid solution is $1.073 \mathrm{~g} / \mathrm{mL}$, what is the pH of the solution?
 
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Chemistry
Chemistry
Raymond Chang, Jason… 14th Edition
Chapter 15, Problem 143 ↓
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About half of the hydrochloric acid produced annually in the United States ( 3.0 billion pounds) is used in metal pickling. This process involves the removal of metal oxide layers from metal surfaces to prepare them for coating. (a) Write the overall and net ionic equations for the reaction between iron(III) oxide, which represents the rust layer over iron, and HCl . Identify the Brønsted acid and base. (b) Hydrochloric acid is also used to remove scale (which is mostly $\mathrm{CaCO}_3$ ) from water pipes (see Chemistry in Action essay "An Undesirable Precipitation Reaction" in Section 4.2). Hydrochloric acid reacts with calcium carbonate in two stages; the first stage forms the bicarbonate ion, which then reacts further to form carbon dioxide. Write equations for these two stages and for the overall reaction. (c) Hydrochloric acid is used to recover oil from the ground. It dissolves rocks (often $\mathrm{CaCO}_3$ ) so that the oil can flow more easily. In one process, a $15 \%$ (by mass) HCl solution is injected into an oil well to dissolve the rocks. If the density of the acid solution is $1.073 \mathrm{~g} / \mathrm{mL}$, what is the pH of the solution?
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About half of the hydrochloric acid produced annually in the United States (3.0 billion pounds) is used in metal pickling. This process involves the removal of metal oxide layers from metal surfaces to prepare them for coating. (a) Write the overall and net ionic equations for the reaction between iron(III) oxide, which represents the rust layer over iron, and $\mathrm{HCl}$. Identify the Brønsted acid and base. (b) Hydrochloric acid is also used to remove scale (which is mostly $\mathrm{CaCO}_{3}$ ) from water pipes (see Chemistry in Action essay "An Undesirable Precipitation Reaction" in Section 4.2 ). Hydrochloric acid reacts with calcium carbonate in two stages; the first stage forms the bicarbonate ion, which then reacts further to form carbon dioxide. Write equations for these two stages and for the overall reaction. (c) Hydrochloric acid is used to recover oil from the ground. It dissolves rocks (often $\mathrm{CaCO}_{3}$ ) so that the oil can flow more easily. In one process, a 15 percent (by mass) HCl solution is injected into an oil well to dissolve the rocks. If the density of the acid solution is $1.073 \mathrm{~g} / \mathrm{mL},$ what is the $\mathrm{pH}$ of the solution?

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About half of the hydrochloric acid produced annually in the United States (3.0 billion pounds) is used in metal pickling. This process involves the removal of metal oxide layers from metal surfaces to prepare them for coating. (a) Write the overall and net ionic equations for the reaction between iron(III) oxide, which represents the rust layer over iron, and HCl. Identify the Bronsted acid and base. (b) Hydrochloric acid is also used to remove scale (which is mostly $\mathrm{CaCO}_{3}$ ) from water pipes (see p. 126). Hydrochloric acid reacts with calcium carbonate in two stages; the first stage forms the bicarbonate ion, which then reacts further to form carbon dioxide. Write equations for these two stages and for the overall reaction. (c) Hydrochloric acid is used to recover oil from the ground. It dissolves rocks (often $\mathrm{CaCO}_{3}$ ) so that the oil can flow more easily. In one process, a 15 percent (by mass) HCl solution is injected into an oil well to dissolve the rocks. If the density of the acid solution is $1.073 \mathrm{g} / \mathrm{mL},$ what is the $\mathrm{pH}$ of the solution?

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About half of the hydrochloric acid produced annually in the United States ( $3.0$ billion pounds) is used in metal pickling. This process involves the removal of metal oxide layers from metal surfaces to prepare them for coating. (a) Write the overall and net ionic equations for the reaction between iron(III) oxide, which represents the rust layer over iron, and $\mathrm{HCl}$. Identify the Broønsted acid and base. (b) Hydrochloric acid is also used to remove scale (which is mostly $\mathrm{CaCO}_{3}$ ) from water pipes (see p. 129). Hydrochloric acid reacts with calcium carbonate in two stages; the first stage forms the bicarbonate ion, which then reacts further to form carbon dioxide. Write equations for these two stages and for the overall reaction. (c) Hydrochloric acid is used to recover oil from the ground. It dissolves rocks (often $\mathrm{CaCO}_{3}$ ) so that the oil can flow more easily. In one process, a 15 percent (by mass) HCl solution is injected into an oil well to dissolve the rocks. If the density of the acid solution is $1.073 \mathrm{~g} / \mathrm{mL}$, what is the $\mathrm{pH}$ of the solution?

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Transcript

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00:01 And our first order of business is to write the overall net ionic equations for the reaction between iron three oxide and hydrochloric acid.
00:16 We're asked to write the complete and net net ionic equations.
00:22 So this will produce.
00:37 I did that backwards.
01:13 I just got a message i was looking at.
01:14 Sorry about that.
01:16 It's about my mother.
01:19 So this looks good.
01:21 There's my complete equation.
01:23 This will be an s and aq.
01:27 This is probably aq and this is l.
01:33 So my net ionic equation will include the species i'm going to highlight probably this, this, this doesn't fully dissociate, and this.
01:51 So my spectator ions will be the, oopsie, chlorides.
02:15 And that'll be what i do wrong here.
02:24 It'll be two fes plus three h2o's.
02:34 Okay.
02:37 Then we're asked to identify the bronze -dalori acid will be hcl because it is the h -plus donor.
02:59 And my bronze -dallory base will be my f .e .203 because it's a h -plus.
03:20 Sort of close enough b b hcl is also used to remove scale it reacts hcl reacts with calcium carbonate in two stages right equations for these two stages okay so the first forms bicarbonate so this stage forms a bicarbonate ion and let's see if i've got all my pieces here.
05:15 Okay, and then what happens? further reacts the bicarbonate ion, then further reacts, i'm assuming with hcl, to form co2 and then on cl minus and h2o.
05:50 And for the overall reaction.
05:54 So my overall reaction will be, that'll be c -a -2 plus my h -c -o.
06:20 That's gone.
06:22 C -a -c -l -2 plus h -2 plus c -o plus co2...
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