Name the compounds represented by the

he first solution contains 25 % acid, the second contains 35 % acid, and the third contains 55 % acid. She created 100 liters of

photoshop1234 [79]

Answer:

Volume of first solution = 20 Liters

Volume of second solution = 20 Liters

Volume of third solution = 60 Liters

Explanation:

Let the volume second solution used= y

Let the volume of third solution used = 3y

Let the volume of first solution used = 100 - (y +3y)

= 100- 4y

The volume of acid in the first solution ( V₁) = 25% of (100-4y)

= 25-y

The volume of acid in the second solution(V₂) =35% of y

= 0.35y

The volume acid in the third solution (V₃) = 55% of 3y

=1.65y

The Volume of acid in Mixture (V₄) = 45% of 100

= 45

From the conservation of volume:

V₄ = V₁ + V₂ + V₃

45 = (25-y )+ 0.35y + 1.65y

45 =25 -y + 0.35y + 1.65y

45 -25 = y

y = 20

So the volume of first solution used = 100- 4y

= 100- 4(20)

= 20 Liters

So the volume of second solution used = y

= 20 Liters

So the volume of third solution used = 3y

= 3(20)

= 60 Liters

3 0

3 years ago

1. You may "feel" cold when you touch certain kinds of matter because

Vinil7 [7]

You may feel cold when you touch certain kinds of matter because some matter gives off cold air. I’m NOT SURE

8 0

3 years ago

Which of the following pairs of chemical reactions are inverses of each other? Answer options: a. Hydrogenation and alkylation b

mariarad [96]

Answer:

d. Oxidation and reduction

Explanation:

For this question we have to remember the definition of each type of reaction:

-) Hydrogenation

In this reaction, we have the addition of hydrogen to a molecule. Usually, an alkene or alkyne. In the example, molecular hydrogen is added to a double bond to produce an alkane.

-) Alkylation

In this reaction, we have the addition of a chain of carbon to another molecule. In the example, an ethyl group is added to a benzene ring.

-) Hydrolysis

In this reaction, we have the breaking of a bond by the action of water. In the example, a water molecule can break the C-O bond in the ester molecule.

-) Halogenation

In this reaction, we have the addition of a halogen (atoms on the VIIIA group). In the example, "Cl" is added to the butene.

-) Ammoniation

In this reaction, we have the addition of the ammonium ion ( $NH_4^+$ ). In the example, the ammonium ion is added to an acid.

-) Oxidation and reduction

In this reaction, we have opposite reactions. The oxidation is the loss of electrons and the reduction is the gain of electrons. For example:

$Ag^+~+~e^-~->~Ag$ Reduction

$Al~->~Al^+^3~+~3e^-$ Oxidation

3 0

3 years ago

Nutral atoms&charged atoms has equal number of proton a)true B)false

Alex73 [517]

Answer:

true

Explanation:

When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral

3 0

4 years ago

Calculate ℰ° values for the galvanic cells described below. (a) cr3+(aq) + cl2(g) equilibrium reaction arrow cr2o72-(aq) + cl -(

Ad libitum [116K]

Answer:

$\boxed{\text{(a) 0.00 V; (b) 0.424 V}}$

Explanation:

We must look up the standard reduction potentials for the half-reactions.

ℰ°

Cr₂O₇²⁻ + 14H⁺ + 6e⁻ ⇌ 2Cr³⁺ + 7H₂O 1.36

Cl₂ + 2e⁻ ⇌ 2Cl⁻ 1.35827

2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O 1.195

Fe³⁺ + e⁻ ⇌ Fe²⁺ 0.771

(a) Cr³⁺/Cl₂

We reverse the sign of ℰ° for the oxidation half-reaction. Then we add the two half-reactions and their ℰ° values.

ℰ°/V

2Cr³⁺ + 7H₂O ⇌ Cr₂O₇²⁻ + 14H⁺ + 6e⁻ -1.36

Cl₂ + 2e⁻ ⇌ 2Cl⁻ 1.358 27

2Cr³⁺ + 3Cl₂ + 7H₂O ⇌ Cr₂O₇²⁻ + 6Cl⁻ + 14H⁺ 0.00

(b) Fe²⁺/IO₃⁻

ℰ°/V

Fe²⁺ ⇌ Fe³⁺ + e⁻ -0.771

2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O 1.195

10Fe²⁺ + 2IO₃⁻ + 12H⁺ ⇌ 10Fe³⁺ + I₂ + 6H₂O 0.424

The ℰ° values for the cells are $\boxed{\textbf{(a) 0.00 V; (b) 0.424 V}}$

4 0

4 years ago