Hydrochloric acid can dissolve solid iron according to the following reaction. Fe(s)+2HCl(aq)→FeCl2(aq)+H2(g) What minimum mass of...

Hydrochloric acid can dissolve solid iron according to the following reaction. Fe(s)+2HCl(aq)→FeCl2(aq)+H2(g) What minimum mass of HCl in grams would you need to dissolve a 2.5 g iron bar on a padlock? How much H2 would be produced by the complete reaction of the iron bar?

Expert Solution

number of mole = (given mass)/(molar mass)
molar mass of Fe = 55.8 g/mol
number of mole of Fe = 2.5/55.8
= 0.045 mole

according to given balanced reaction in question
1 mole Fe require 2 mole of HCl
0.045 mole Fe require (2*0.045) mole of HCl
minimum number of mole of HCl = (2*0.045) mole
= 0.09 mole

molar mass of HCl = 36.5 g/mol
minimum mass of HCl require = (molar mass)*(minimum number of mole of HCl )
= (0.09*36.5) g
= 3.3 g

also, according to given reaction
1 mole of Fe produce 1 mole of H2
0.045 mole of Fe produce 0.045 mole of H2
number of mole of H2 produce = 0.045 mole
molar mass of H2 = 2 g/mol
mass of H2 produce = (number of mole of H2)*(molar mass of H2)
= (0.045*2)
= 0.09 g

queen_honey_blossom answered 2 years ago

Consider the reaction Fe(s) + 2HCl(aq)FeCl2(s) + H2(g) for which H° = -7.400 kJ and S°...

Consider the reaction Fe(s) + 2HCl(aq)FeCl2(s) + H2(g) for which H° = -7.400 kJ and S° = 107.9 J/K at 298.15 K. (1) Calculate the entropy change of the UNIVERSE when 2.097 moles of Fe(s) react under standard conditions at 298.15 K. Suniverse = J/K (2) Is this reaction reactant or product favored under standard conditions? _________reactantproduct (3) If the reaction is product favored, is it enthalpy favored, entropy favored, or favored by both enthalpy and entropy? If the reaction is...

Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When 0.107 g...

Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When 0.107 g of Zn(s) is combined with enough HCl to make 54.9 mL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 22.0 ∘C to 24.0 ∘C. Find ΔHrxn for this reaction as written. (Use 1.0 g/mL for the density of the solution and 4.18 J/g⋅∘C as the specific heat capacity.)

Consider the reaction: FeS(s) + 2HCl (aq) --> FeCl2(aq) + 2H2S(g). A 4.00g sample of FeS...

Consider the reaction: FeS(s) + 2HCl (aq) --> FeCl2(aq) + 2H2S(g). A 4.00g sample of FeS containing nonsulfuide impurities reacted with HCl to give 896mL of H2S at 14C and 782 mmHg.Calculate mass percent purity of the sample. State your final answer using 3 Sig figs

The reaction is: Mg(s) + 2HCl(aq) --> MgCl2 (aq) + H2(g) 1. If 2.016 g of...

The reaction is: Mg(s) + 2HCl(aq) --> MgCl2 (aq) + H2(g) 1. If 2.016 g of hydrogen (H2) was released, how many moles of magnesium reacted? How many grams of magnesium would this be? 2. How many moles of magnesium would replace one mole of hydrogen (H) in the hydrochloric acid? How many grams? (This is the equivalent weight) 3. Compare the mass calculated above in question 2 to your experimental equivalent weight and calculate the percent difference. What would...

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) +...

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq)  FeCl2(aq) + H2(g); H°= –87.9 kJ How much heat is liberated at constant pressure if 0.680 g of iron reacts with 49.8 mL of 0.661 M HCl? A) 1.07 kJ B) 6.86 kJ C) 1.45 kJ D) 87.9 kJ E) 59.8 kJ

Given : 2HCl(aq) + Mg(s) -> MgCl2(aq) +H2(g) Mg(s) + 1/2 O2(g) -> MgO(s) Mass of...

Given : 2HCl(aq) + Mg(s) -> MgCl2(aq) +H2(g) Mg(s) + 1/2 O2(g) -> MgO(s) Mass of 3.00M HCl (diluted in water) : 88.4g Vol of 3.00M HCl : 87.5mL Mass of Mg : 0.599g Total mass: 88.999g --------------------------------------------------------------------------------------- Find mole of product IF: (show calculations) A. HCl is the limiting reactant: ______ B. Mg is the limiting reactant: ______

Using the balanced equation Mg(s)+2HCl(aq)>MgCl2(aq)+H2(g), what volume of hydrogen would be produced by the reaction of...

Using the balanced equation Mg(s)+2HCl(aq)>MgCl2(aq)+H2(g), what volume of hydrogen would be produced by the reaction of 2.00 g of magnesium with an excess of hydrochloric acid at 746 torr and 26.2°C?

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl: Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) How many...

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl: Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) How many liters of H2 would be formed at 636 mm Hg and 17 ∘C if 27.0 g of zinc was allowed to react? How many grams of zinc would you start with if you wanted to prepare 6.85 L of H2 at 284 mm Hg and 28.5 ∘C?

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl : Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) 1)How...

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl : Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) 1)How many liters of H2 would be formed at 592 mm Hg and 17 ∘C if 25.5 g of zinc was allowed to react? 2)How many grams of zinc would you start with if you wanted to prepare 4.60 L of H2 at 294 mm Hg and 34.5 ∘C ?

Consider the reaction between the zinc metal (Zn) and hydrochloric acid (HCl), 2HCl (aq) + Zn...

Consider the reaction between the zinc metal (Zn) and hydrochloric acid (HCl), 2HCl (aq) + Zn (s) → ZnCl2 (aq) + H2 (g). How many grams of hydrogen gas (H2) are possible when 0.500 grams of Zn is added to 250 mL of a 0.123 M HCl solution? (Answer: 0.0154 grams of H2) Please give a step by step explanation. Answer is given above

Question