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Bogdan [553]
2 years ago
12

A 16.42 mL volume of 0.1327 M KMnO4 solution is needed to oxidize 25.00 mL of a FeSO4 solution in acidic medium. What is the con

centration of the FeSO4 solution in molarity?
Chemistry
1 answer:
statuscvo [17]2 years ago
6 0

The concentration of the FeSO4 solution in molarity would be 0.4356

The concentration can be derived first by writing out the balanced equation of the reaction:

  • 5Fe^2^++MnO^4^-+8H^+--->5Fe^3^++Mn^2^++4H_2O

From the balanced equation: for every 1 mole of KMnO4, 5 moles of FeSO4 is needed for complete oxidation.

Recall that: mole = molarity x volume

Mole of KMnO4 needed = 0.1327 x 0.01642

                  = 0.002179 mole

1 mole KMnO4 = 5 mole FeSO4

0.002178 mole = 5 x 0.002178/1

                             = 0.01089 moles of FeSO4

Molarity of FeSO4 = mole/volume

                                 = 0.01089/0.025

                               = 0.4356 M

More on the calculation of molarity of solutions can be found here: brainly.com/question/16587536

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Answer: Ca2+

Explanation: calcium is most like to form Ca2+ because it has 2 electrons in it outermost shell. So it can only contribute 2 electrons for bonding.

7 0
3 years ago
In general, the higher the charge on the ions in an ionic compound, the more favorable is the lattice energy. Why do some stable
Sever21 [200]

Answer:

The main reason why some stable ionic compounds have +1 charged ions, even though other higher would have a more favorable lattice energy is because;

1. Energy is required to remove each of the electrons in an atom, and the more more the electrons are removed, the smaller the atom radius becomes, with increasing nuclear attraction between the opposite charges.

Note, it is a bit easy to remove a single electron, when compared to 4, 5 or 6 electrons. hence, the reason why Ionic compounds are more stable with + charged ions than others.

2. The stability of an ionic compound is dependent on his lattice energy. And the ions with large charge will have a greater attraction between the cations and anions, hence have higher lattice energy. However, the distance between the ions and the nucleus of the atom plays a major role in the stability of the ion.

7 0
2 years ago
a solution k is saturated at 33 g solute in 100g solvent if a 50g solute is added to 200g solvent solution k is​
Alenkinab [10]

Answer:

33 100gc50 is a 100

Explanation:

3 0
2 years ago
Find the number of cations present in 7g of sodium prosphate Na=23 g/mol O=16g/mol P=31g/mol​
Snowcat [4.5K]

Answer:    This contains magnesium, Mg2+, and hydroxide, OH–

, ions. Each magnesium ion is +2 and

each hydroxide ion is -1: two -1 ions are needed for one +2 ion, and the formula for magnesium

hydroxide is Mg(OH)2. The (OH)2 indicates there are two OH–

ions. In a formula unit of

Mg(OH)2, there are one magnesium ion and two hydroxide ions; or one magnesium, two

oxygen, and two hydrogen atoms. The subscript multiplies everything in ( )

hope that helped!!

3 0
3 years ago
A 0.271g sample of an unknown vapor occupies 294ml at 140C and 874mmHg. The emperical formula of the compound is CH2. How many m
Phoenix [80]
Using PV = nRT, we can calculate the moles of the sample.
874 mmHg = 116,524 Pa
n = PV/RT
n = 116,524 x 294 x 10⁻⁶ / 8.314 x (140 + 273)
n = 9.98 x 10⁻³ mol

moles = mass / Mr
Mr = 0.271/9.98 x 10⁻³
Mr = 27.2
Mass of empirical formula = 14
Repeat units = 27.2 / 14 ≈ 2

Formula of substance:
C₂H₄

Combustion equation:
C₂H₄ + 3O₂ → 2CO₂ + 2H₂O

1 mole produces 2 moles of CO₂, so 3 moles will produce 6 moles CO₂
7 0
2 years ago
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