1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gwar [14]
2 years ago
10

Consider this reaction: 2Al(s) + 3 CuCl2(aq) → 2AlCl3(aq) + 3 Cu(s) If the concentration of CuCl2 drops from 1.000 M to 0.655 M

in the first 30.0 s of the reaction, what is the average rate of reaction over this time interval?
Chemistry
2 answers:
Yuliya22 [10]2 years ago
6 0

Answer:

r=-0.0115M/s

Explanation:

Hello,

In this case, the rate is computed as:

r=\frac{C_F-C_0}{T_F-T_0}

As the reaction is analyzed during the first 30 seconds, the average rate will be:

r=\frac{0.655M-1.000M}{30s-0s}=-0.0115M/s

Which negative since the cupric chloride is a reagent.

Best regards.

blondinia [14]2 years ago
4 0

Answer:

rate = 0.00383 M/s

Explanation:

The rate of reaction refers to the speed at which the products are formed from the reactants in a chemical reaction

2Al(s) + 3 CuCl2(aq) → 2AlCl3(aq) + 3 Cu(s)

The equation for reaction rate in this chemical reaction (for CuCl₂)  is the following one (The value 1/3 comes from the coefficient in the chemical equation for the reaction):

\text{rate of reaction}  = - \frac{1}{\text{coefficient}} \frac{Reactant}{Time}

Here, the negative sign is used to indicate the decreasing concentration of the reactant.

rate= -\frac{1}{3} \times \frac{C2-C1}{t2-t1}

rate = - 1/3 [0.655 - 1.0 / 30]

rate = -1/3[-0.0115]

rate = 3.83 x 10-3 M/s

rate = 0.00383 M/s

You might be interested in
A 34.57 mL sample of an unknown phosphoric acid solution is titrated with a 0.127 M sodium hydroxide solution. The equivalence p
Bas_tet [7]

<u>Answer:</u> The concentration of unknown phosphoric acid solution is 0.034 M

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is H_3PO_4

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=3\\M_1=?M\\V_1=34.57mL\\n_2=1\\M_2=0.127M\\V_2=28.2mL

Putting values in above equation, we get:

3\times M_1\times 34.57=1\times 0.127\times 28.2\\\\M_1=\frac{1\times 0.127\times 28.2}{3\times 34.57}=0.034M

Hence, the concentration of unknown phosphoric acid solution is 0.034 M

7 0
3 years ago
Sodium phosphate is added to a solution that contains 0.0030 M aluminum nitrate and 0.016 M calcium chloride. The concentration
gavmur [86]

Explanation:

It is given that aluminium nitrate and calcium chloride are mixed together with sodium phosphate.

And, K_{sp} of AlPO_{4} = 9.84 \times 10^{-21}

        K_{sp} of Ca_{3}(PO_{4})_{2} = 2.0 \times 10^{-29}

Let us assume that the solubility be "s". And, the reaction equation is as follows.

        AlPO_{4} \rightleftharpoons Al^{3+} + PO^{3-}_{4}

     9.84 \times 10^{-21} = s \times s

             s = 9.92 \times 10^{-11}

Also,     Ca_{3}(PO_{4})_{2} \rightleftharpoons 3Ca^{2+} + 2PO^{3-}_{4}

                2 \times 10^{-29} = (3s)^{3} \times (2s)^{2}

                            s = 7.14 \times 10^{-7}

This means that first, aluminium phosphate will precipitate.

Now, we will calculate the concentration of phosphate when calcium phosphate starts to precipitate out using the K_{sp} expression as follows.

         K_{sp} = [Ca^{2+}]^{3}[PO^{3-}_{4}]^{2}

          2.0 \times 10^{-29} = (0.016)^{3}[PO^{3-}_{4}]^{2}

       2.0 \times 10^{-29} = 4.096 \times 10^{-6} \times [PO^{3-}_{4}]^{2}

       [PO^{3-}_{4}]^{2} = 4.88 \times 10^{-24}

                             = 2.21 \times 10^{-12} M

Similarly, calculate the concentration of aluminium at this concentration of phosphate as follows.

             AlPO_{4} \rightleftharpoons Al^{3+} + PO^{3-}_{4}

           K_{sp} = [Al^{3+}][PO^{3-}_{4}]

       9.84 \times 10^{-21} = [Al^{3+}] \times 2.21 \times 10^{-12}

                [Al^{3+}] = 4.45 \times 10^{-9} M

Thus, we can conclude that concentration of aluminium will be 4.45 \times 10^{-9} M when calcium begins to precipitate.

7 0
2 years ago
How many electrons in an atom can have each of the following quantum number or sublevel designations?
storchak [24]

10 electrons in an atom can have each of the 3d quantum number or sublevel designations.

<h3>What are four quantum numbers?</h3>

Quantum numbers are used to characterize the values of conserved quantities in a quantum system's dynamics in both quantum physics and chemistry.

1) The "n" sign refers to the principal quantum number. It shows how many shells there are.

2) The "l" sign indicates the azimuthal quantum number. It gives the form of the orbitals and their angular momentum. 0 to n-1 make up its range.

3) "m_{l}" stands for the magnetic quantum number. It serves as a cue for spatial orientation. The range of it is -l to +l.

4) Spin quantum number, represented by the symbol "m_{s}". It shows how the electron is spinning.

Learn more about quantum numbers here:

brainly.com/question/14288557

#SPJ4

4 0
2 years ago
The vapor pressure of liquid octane, C8H18, is 40.0 mm Hg at 318 K. A sample of C8H18 is placed in a closed, evacuated container
Sergio039 [100]

Answer:

a, d

Explanation:

a. The pressure in the container will be 42.8 mm Hg.

d. Some of the vapor initially present will condense.

6 0
2 years ago
How many electrons are in the outermost energy level of oxygen who's atomic number is 8?
andrey2020 [161]
There are two in the first ring leaving only six out of eight to go on the next

8 0
2 years ago
Other questions:
  • The periodic law states that the physical and chemical properties tend to repeat periodically when elements are arranged accordi
    12·1 answer
  • The atoms of which element will typically form ions
    14·1 answer
  • What’s the physical properties of a molecular solid, in regards to its physical properties of formation?
    8·1 answer
  • Which ion makes the waste alkaline?
    14·1 answer
  • Based on Charles's law, which of the following statements is true for an ideal gas at a constant pressure and mole amount?
    13·1 answer
  • The limiting reactant is the chemical substance that determines the amount of product(s) that can ultimately be formed in a reac
    9·1 answer
  • Is BaSO3 a poly atomic covalent
    11·1 answer
  • What is the compound NH3
    9·2 answers
  • Calculate the density of an object whose mass is 352 grams and has a volume of 469 mL please show work
    8·1 answer
  • What is wrong with this model of the atom.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!