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In: Chemistry

1)For each of the following reactions, calculate ΔH∘rxn, ΔS∘rxn, and ΔG∘rxn at 25 ∘C. 3H2(g)+Fe2O3(s)→2Fe(s)+3H2O(g) N2(g)+3H2(g)→2NH3(g)...

1)For each of the following reactions, calculate ΔH∘rxn, ΔS∘rxn, and ΔG∘rxn at 25 ∘C.

3H2(g)+Fe2O3(s)→2Fe(s)+3H2O(g)

N2(g)+3H2(g)→2NH3(g)

2)Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00×10⁻²M . The diluted solution is then placed in a spray bottle for application on the desired surfaces.

How many moles of luminol are present in 2.00 L of the diluted spray?

3)A student placed 11.0 g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 55.0 mLsample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution?

4)A sugar crystal contains approximately 1.4×10¹⁷sucrose (C12H22O11) molecules.

5)When solutions of silver nitrate and potassium chloride are mixed, silver chloride precipitates out of solution according to the equation

AgNO3(aq)+KCl(aq)→AgCl(s)+KNO3(aq)

a)What mass of silver chloride can be produced from 1.17 L of a 0.122 M solution of silver nitrate?

b)The reaction described in Part A required 3.39 L of potassium chloride. What is the concentration of this potassium chloride solution?

5)Consider the precipitation reaction: Li2S(aq)+Co(NO3)2(aq)→2LiNO3(aq)+CoS(s)

a)What volume of 0.160 M Li2S solution is required to completely react with 125 mL of 0.160 M Co(NO3)2?

6)What is the minimum amount of 6.8 M H2SO4 necessary to produce 27.3 g of H2 (g) according to the following reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)

7)Consider the precipitation reaction: 2Na3PO4(aq)+3CuCl2(aq)→Cu3(PO4)2(s)+6NaCl(aq)

a) What volume of 0.180 M Na3PO4 solution is necessary to completely react with 87.1 mL of 0.122 M CuCl2?

Solutions

Expert Solution

Problem 1

Problem 2

Answer 0.12 moles

Problem 3

11.0 g of glucose (C6H12O6) in 100. mL of solution

Answer 1.21 g glucose

Please check question 4)

4)A sugar crystal contains approximately 1.4×1017sucrose (C12H22O11) molecules.

it looks like the answer is missing.

Please repost the remaining questions in a new set

If you have any doubts leave a comment :)

queen_honey_blossom answered 2 hours ago

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