Chemistry, 21.07.2019 11:00 CMB420

Sulfuric acid reacts with aluminum hydroxide by double replacement. a. if 30.0 g of sulfuric acid reacts with 25.0 g of aluminum hydroxide, identify the limiting reactant. b. determine the mass of excess reactant remaining. c. determine the mass of each product formed. assume 100% yield.

Answers: 1

Show answers

Answers

a.
The balanced equation for the reaction between sulfuric acid and aluminium hydroxide is,
3H₂SO₄ + 2Al(OH)₃ → Al₂(SO₄)₃ + 6H₂O

mass of H₂SO₄  =    30.0 g
Molar mass of H₂SO₄  = 98 g/mol
moles of H₂SO₄ = 30.0 g /98g /mol = 0.306 mol

mass of Al(OH)₃   =     25.0 g
Molar mass of Al(OH)₃  = 78 g/mol
moles of Al(OH)₃   = 25.0 g/ 78 g/mol = 0.321 mol

Stoichiometric ratio between H₂SO₄ and Al(OH)₃ is 3 : 2

Hence reacted moles of H₂SO₄ = 0.306 mol
reacted moles of Al(OH)₃ = 0.306 mol x (2 / 3) = 0.204 mol

Hence the limiting reactant is H₂SO₄

b.
According to the above calculation, the excess reactant is Al(OH)₃.

The reacted moles of Al(OH)₃ = 0.306 mol x (2 / 3) = 0.204 mol

The added moles of Al(OH)₃ = 0.321 mol

Hence the remaining Al(OH)₃ moles = added moles - reacted moles
= 0.321 mol - 0.204 mol
= 0.117 mol

Molar mass of Al(OH)₃  = 78 g/mol
Remaining mass of Al(OH)₃ = number of moles x molar mass
= 0.117 mol x 78 g/mol
= 9.126 g

c.

The products formed from the reaction between aluminium hydroxide and sulfuric acid are Al₂(SO₄)₃ and H₂O

The limiting reactant is H₂SO₄

The stoichiometric ratio between H₂SO₄ and Al₂(SO₄)₃ is 3 : 1
Reacted moles of H₂SO₄ = 0.306 mol
Hence the moles of Al₂(SO₄)₃ formed = 0.306 mol / 3
= 0.102 mol
Molar mass of Al₂(SO₄)₃ = 342 g/mol
Mass of Al₂(SO₄)₃ formed = 0.102 mol x 342 g/mol
= 34.884 g

The stoichiometric ratio between H₂SO₄ and H₂O is 3 : 6
Reacted moles of H₂SO₄ = 0.306 mol
Hence the moles of H₂O formed = 0.306 mol x (6 / 3)
= 0.612 mol
Molar mass of H₂O = 18 g/mol
Mass of H₂O formed = 0.612 mol x 18 g/mol
= 11.016 g

Answer from: Quest

elements

explanation:

yes the other ones are right just show me a pic of ur face cuz u look hot

Answer from: Quest

0.88m hope i am correct : )

Another question on Chemistry

Chemistry, 22.06.2019 04:00

Actual ingredients of lab (the cookies i am actually making) 1/2 cup sugar 1/2 cup brown sugar 1 1/3 stick margarine 1 egg 1/2 tsp salt 1 tsp vanilla 1/2 tsp baking soda 1 1/2 cup flour 1 1/3 cup chocolate chip can you answer the questions below ? discussion 1. suppose you are given the following amounts of ingredients: 1 dozen eggs 24 tsp. of vanilla 1 lb. (82 tsp.) of salt 1 lb. (84 tsp.) of baking soda 3 cups of chocolate chips 5 lb. (11 cups) of sugar 2 lb. (4 cups) of brown sugar 1 lb. (4 sticks) of margarine a. for each ingredient, calculate how many cookies could be prepared if all of that ingredient were consumed. (for example, the recipe shows that using 1 egg- with the right amounts of the other ingredients- yields 24 cookies. how many cookies can you make if the recipe is increased proportionately for 12 eggs? ) b. to determine the limiting reactant for the new ingredients list, identify which ingredient will result in the fewest number of cookies. c. what is the maximum number of cookies that can be produced from the new amounts of ingredients?

Answers: 1

Answer

Chemistry, 22.06.2019 04:30

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units:

Answers: 1

Answer

Chemistry, 22.06.2019 16:00

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Answers: 2

Answer

Chemistry, 22.06.2019 18:00

An object displaces 652 ml of water. the volume of the object is: 0.652 cm³ 6.52 cm³ 65.2 cm³ 652 cm³

Answers: 2

Answer

You know the right answer?

Sulfuric acid reacts with aluminum hydroxide by double replacement. a. if 30.0 g of sulfuric acid re...

Questions