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
Mice21 [21]
3 years ago
14

Chris the chemist works in a laboratory in which the temperature is maintained at a constant 25oc and the pressure is always 100

kpa. chris needs to analyse some calcium carbonate, caco3(s), to determine whether it is pure or has been contaminated. chris will analyse the calcium carbonate by taking a small 0.00500 mole sample and adding hydrochloric acid, hcl(aq), to it until all the calcium carbonate has disappeared and no more carbon dioxide gas, co2(g), is produced. as the gas is produced it will be collected by a water displacement method. the balanced chemical equation for this reaction is known to be: caco3(s) + 2hcl(aq) → cacl2(aq) + co2(g) + h2o(l) if the sample is pure, what volume of carbon dioxide gas will be collected?
Chemistry
1 answer:
algol133 years ago
3 0

The given balanced chemical equation:

CaCO_{3}(s) +2 HCl (aq) --> CaCl_{2}(aq)+H_{2}O(l) + CO_{2}(g)

Calculating the moles of carbon-dioxide:

Given, moles of CaCO_{3} = 0.00500 mol CaCO_{3}

Moles of CO_{2} = 0.00500 mol CaCO_{3} * \frac{1 mol CO_{2}}{1 mol CaCO_{3}}

= 0.00500 mol CO_{2}

Using the ideal gas equation to find out volume from moles, pressure and temperature:

PV = nRT

P is the pressure = 100 kPa *\frac{1 atm}{101.325 kPa} =  0.987 atm

T is the temperature = 25^{0}C + 273 = 298 K

(0.987 atm)(V) = (0.00500 mol)(0.08206 \frac{L.atm}{(mol.K)}(298K)

V = 0.124 L or 124 mL

Therefore, 124 mL of carbon dioxide will be collected.

You might be interested in
Find the length of time required for the total pressure in a system containing N2O5 at an initial pressure of 0.110 atm to rise
USPshnik [31]

Answer:

t = 37.1 s

Explanation:

The equation for the reaction is given as;

                  2 N2O5(g)  --> 4 NO2 + O2

Initial:          0.110                  -             -

change:        -2x                  +4x        +x

Final:          0.110 - 2x           +4x        +x

But final = 0.150atm;

0.110 - 2x    +  4x   +  x = 0.150 atm

3x = 0.150 - 0.110

x = 0.0133 atm

Pressure in reactant side;

0.110 - 2x

0.110 - 2 (0.0133) = 0.0834 atm

The integral rate law expression is given as;

ln ( [A] / [Ao] ) = -kt

k =  rate constant = 7.48*10^-3*s-1

ln (0.0834/0.11) = (7.48*10^-3)  t

upon solving, t = 37.1 s

3 0
3 years ago
1. Calculate the average reaction rate expressed in moles H2 consumed per liter per second.
valentina_108 [34]

Answer:

1) 0.0025 mol/L.s.

2) 0.0025 mol/L.s.

Explanation:

  • For the reaction:

<em>H₂ + Cl₂ → 2HCl.</em>

<em></em>

<em>The average reaction rate = - Δ[H₂]/Δt = - Δ[Cl₂]/Δt = 1/2 Δ[HCl]/Δt</em>

<em></em>

<em>1. Calculate the average reaction rate expressed in moles H₂ consumed per liter per second.</em>

<em></em>

The average reaction rate expressed in moles H₂ consumed per liter per second = - Δ[H₂]/Δt = - (0.02 M - 0.03 M)/(4.0 s) = 0.0025 mol/L.s.

<em>2. Calculate the average reaction rate expressed in moles CI₂ consumed per liter per second.</em>

<em></em>

The average reaction rate expressed in moles Cl₂ consumed per liter per second = - Δ[Cl₂]/Δt = - (0.04 M - 0.05 M)/(4.0 s) = 0.0025 mol/L.s.

7 0
3 years ago
A salad is an example of a mixture that is ... Mixed
melomori [17]
Heterogeneous Mixture
8 0
3 years ago
What is the percentage of oxygen in air<br> ASAP...​
abruzzese [7]

Explanation:

21 % of oxygen is present in air .

hope it is helpful to you

3 0
3 years ago
Please help! Thanks
trapecia [35]

Th actual yield of the reaction is 24.86 g

We'll begin by calculating the theoretical yield of the reaction.

2Na + Cl₂ → 2NaCl

Molar mass of Na = 23 g/mol

Mass of Na from the balanced equation = 2 × 23 = 46 g

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mass of NaCl from the balanced = 2 × 58.5 = 117 g

From the balanced equation above,

46 g of Na reacted to produce 117 g of NaCl.

Therefore,

11.5 g of Na will react to produce = (11.5 × 117) / 46 = 29.25 g of NaCl.

Thus, the theoretical yield of NaCl is 29.25 g.

Finally, we shall determine the actual yield of NaCl.

  • Percentage yield = 85%
  • Theoretical yield = 29.25 g
  • Actual yield =?

Actual yield = Percent yield × Theoretical yield

Actual yield = 85% × 29.25

Actual yield = 0.85 × 29.25 g

Actual yield = 24.86 g

Learn more about stoichiometry: brainly.com/question/25899385

7 0
3 years ago
Other questions:
  • Can you answer these
    13·1 answer
  • List 2 of the important properties of gases.
    14·2 answers
  • The following ionization energies were found for an unknown element: -
    10·1 answer
  • ENTER THE COEFFICIENTS DIRECTLY FROM THE BALANCED CHEMICAL EQUATION. do not reduce to lowest terms. for example: if 3 moles H2 r
    10·1 answer
  • Buffer capacity. Two solutions of sodium acetate are prepared, one having a concentration of 0.1 M and the other having a concen
    10·1 answer
  • The compound dimethylamine, (CH3)2NH, is a weak base when dissolved in water. Write the Kb expression for the weak base equilibr
    13·1 answer
  • Ive been on this for 30 min and I’m kinda struggling so if anyone can help me that wiped be Appreciated
    6·2 answers
  • Which of the following could be classified as producing a physical change?
    15·2 answers
  • What happens when chalk powder and sand are added to water give reasons
    11·1 answer
  • Which of the following statements about trash in the United States is FALSE? Each person produces about 2 kg of trash per day. T
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!