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A major industrial use of hydrochloric acid is in metal pickling. This process involves the removal of metal oxide layers from metal surfaces to prepare them for coating. (a) Write an equation between iron(III) oxide, which represents the rust layer over iron, and HCl to form iron(III) chloride and water. (b) If 1.22 moles of $\mathrm{Fe}_{2} \mathrm{O}_{3}$ and $289.2 \mathrm{g}$ of HCl react, how many grams of $\mathrm{FeCl}_{3}$ will be produced?

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a.) $\mathrm{Fe}_{2} \mathrm{O}_{3}+6 \mathrm{HCl} \rightarrow 2 \mathrm{FeCl}_{3}+3 \mathrm{H}_{2} \mathrm{O}$b.) $395.78 \mathrm{g}$

Chemistry 101

Chapter 3

Mass Relationships in Chemical Reactions

Chemical reactions and Stoichiometry

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04:02

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Chemical reactions can be either spontaneous, requiring no input of energy, or non-spontaneous, typically following the input of some type of energy, such as heat, light or electricity. Chemical reactions are usually characterized by a chemical change, and they yield one or more products after the reaction is complete. Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions. Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms.

08:02

In chemistry, a combination reaction is a chemical reaction in which two or more reactants combine to form more than one product. In a decomposition reaction, one reactant splits into two or more products.

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A major industrial use of …

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Enter your answer in the p…

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The steel industry uses la…

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Hydrochloric acid is known…

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Titanium(III) chloride is …

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Iron reacts with hydrochlo…

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Hydrochloric acid can diss…

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The reaction of iron metal…

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Describe how to prepare zi…

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We have given information for part a we have to right. The equation between iron irontryoxide and also the equation is a 2 o 3 iron oxide plus h c l, iron chloride, plus h, 2 o water. Since we have 2 iron atoms on reacting side and only 1 product side, we will place 2 in front of f e c l 3. So the equation: p 2, o 3 plus 8 t l and will place 2 in front of f e c. L f c l, 3, plus h, 2 o now we have 6 chlorine atoms on pride, 6 chlorine atoms outside 2 into 36 and 11. Chlorine atom is reactant side, so we will place 6 in front of c l in reacting side. So the equation becomes a v 2, o 3 plus 6 c l, o f e c l, 3, plus h 20 point now. There are 6 hydrogen 6 hydrogen atoms and reactant side and 2 on the product side. Hence we will place 3 in front of h. 2 and get the balance equation, and here we put 63 in front of h, 2 o and it becomes 63 into 26 and the equation becomes balance. So we have the equation: f: e 2, o 3 plus 6 c, l, 2, f e c l, 3 plus 3, h, 2, o. So the final result will be f: e, 2, o 3 plus 6 c, l, 2, f, a c l, 3 plus 3 h. 2, o this is balance equation and given information for part b, f e 2, o 3 plus 6 cl 2 f e c l, 3 plus 3, h, 2 o. So the number of moles of moles of f e 2 o 3 is n, f e 2. O 3 is equal to 1.22 mole. The mass of hcl is mass of atl is equal to 289.2 gram. We have to find the mass of f e c l 3 that will be produced. So first we will find the number of moles of c l the acal molar mass is mass, is molar. Mass of c l is equal to molar. Mass of hydrogen plus molar mass of chlorine is equal to a molar. Mass of hydrogen is 1.008 gram per mole, plus smaller mass of chlorine is 35.453 gram per mole is equal to molar. Mass mild mass of cal is 36.461 gram per mole. The number of moles of etzel is number of moles. Of c l is equal to mass of l divided by molar. Mass of l is equal to mass of cl mass of lis 2 hund 89.2 gram divided by molar mass of cl is 36.461 gram per mole is equal to gram. Gram cancel 7.93 mole since 1. Molar f, 2, o 3 reacts with 6 molar 1.22 moles of f e 2. O 3 will react with 1.22 moles 6 is equal to 17.32 moles and 7.32 moles of c l. Hence you will write it here. Since 1, mole of f e 2 o 3 reacts with 6 moles of h c l, 1.22 moles of a v 2 o 3 will react with 1.22 mole into 6 is equal to 7.32 mole 7.32 moles of clencthere will be access amount of aselseven .93 mole Minus 7.32 mole is equal to 0.61 mole. The limiting reactant is f e 2 o threenow. We will find the number of moles of a b c l 3 to 1 mole of f e 2, o 3 produce 2 moles of f e c l. 3. Therefore, 1.22 moles of f e 203 will produce 2 into 1.22 mole 2.44 moles of f e c l 3 point. Now we will find the mass of f e c l. 3. I find the mass of f e c l 3, so molar mass of f e c l 3 is equal to mass of f e plus 3 into molar mass of c l is equal to molar. Mass of iron is 55.845 gram per mole plus 3 into molar. Mass of chlorine is 35.453 gram per mole is equal to 162.204 gram per mole. Thereforethe mass of f e c n 3 is mass of f e c. L 3 is equal to a number of moles of f e c l 3 into molar mass of f c. L. 3 is equal to a number of moles of f e c. L. 3 is 2.44 because 1 molar f e 2, o 3 produces 2 mole. F e c l 3, therefore 1.22 moles of f e 2, o 3 will produce 2 into 2. Multiply. 1.22 mole is equal to 2.44 moles of f e c l 3. So here number of moles of f c l 3 is 2.44 mole. Moles into molar mass of iron chloride is 162.204. Gram per mole is equal to 395.78 gram is the mass of iron chloride of e cl 3. So the final result is the mass of iron chloride is 395.78 gram.

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