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
Mila [183]
3 years ago
9

Notice that the effective analytical connection for analysis of hypochlorite anion by the thiosulfate anion in this experiment i

s the sum of the two reactions: 1) hypochlorite anion with iodide anion to form iodine, and 2) thiosulfate anion with the iodine formed in reaction one. In your laboratory notebook sum these two reactions to find the stoichiometric factor that relates moles of thiosulfate anion needed to react with each mole of hypochlorite anion in the bleach sample. Then select the correct response. a. One mole of thiosulfate anion needed to react with one mole of hypochlorite anion. b. Two moles of thiosulfate anion needed to react with one mole of hypochlorite anion. c. Three moles of thiosulfate anion needed to react with one mole of hypochlorite anion.
Chemistry
1 answer:
hoa [83]3 years ago
7 0

Answer:

b. Two moles of thiosulfate anion needed to react with one mole of hypochlorite anion.

Explanation:

1. Hypochlorite with iodide

                      2I⁻ ⟶ I₂ + 2e⁻

<u>ClO⁻ + 2H⁺ + 2e⁻ ⟶ Cl⁻ + H₂O      </u>

2I⁻ + ClO⁻ + 2H⁺ ⟶ I₂  + Cl⁻ + H₂O

2. Thiosulfate with iodine

     2S₂O₃²⁻ ⟶ S₄O₆²⁻ + 2e⁻

<u>       I₂ + 2e⁻ ⟶ 2I⁻               </u>    

2S₂O₃²⁻ + I₂ ⟶ S₄O₆²⁻ + 2I⁻

3. Sum of the reactions

                2I⁻ + ClO⁻ + 2H⁺ ⟶ I₂  + Cl⁻ + H₂O

<u>                       2S₂O₃²⁻ + I₂ ⟶ S₄O₆²⁻ + 2I⁻                    </u>

2I⁻ + ClO⁻ + 2S₂O₃²⁻ + 2H⁺ ⟶ I₂  + Cl⁻ + S₄O₆²⁻ + H₂O

4. Molar ratio

S₂O₃²⁻:ClO⁻ = 2:1

You might be interested in
Is sand biotic or abiotic
Vsevolod [243]
Non living things are abiotic so sand is abiotic
8 0
3 years ago
Which best describes a compound such as sodium
tresset_1 [31]
<span>a pure substance that can be separated into different elements by chemical means</span>
3 0
3 years ago
What is the pH of a 0.0042 M hydrochloric acid solution?
babymother [125]

Answer:

E) 2.38

Explanation:

The pH of any solution , helps to determine the acidic strength of the solution ,

i.e. ,

  • Lower the value of pH , higher is its acidic strength

and ,

  • Higher the value of pH , lower is its acidic strength .

pH is given as the negative log of the concentration of H⁺ ions ,

hence ,

pH = - log H⁺

From the question ,

the concentration of the solution is 0.0042 M , and being it a strong acid , dissociates completely to its respective ions ,

Therefore , the concentration of H⁺ = 0.0042 M .

Hence , using the above equation , the value of pH can be calculated as follows -

pH = - log H⁺

pH = - log ( 0.0042 M )

pH =  2.38 .

4 0
4 years ago
Please answer this question​
vova2212 [387]

Answer:

Yes

Explanation:

Natural gas is colorless and odorless, and explosive, so a sulfur-smell (similar to rotten eggs) is usually added for early detection of leaks. ... Natural gas is a fossil fuel. Natural gas is a non-renewable hydrocarbon used as a source of energy for heating, cooking, and electricity generation.

5 0
2 years ago
What form of matter has a definite shape and takes up space?​
BARSIC [14]

Answer:

If something is in a solid state of matter, it has a definite shape and volume. The volume of an object is the amount of space it occupies. A block of wood placed on a table retains its shape and volume, therefore, it is an example of a solid. If a liquid is poured on that same table, there are very different results

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • The length of a sheet of U.S standard (letter size) paper is closest to: 8 centimeters 11 centimeters 29 centimeter 300 centimet
    7·1 answer
  • Explain how heat would change the density of a parcel of air
    12·1 answer
  • Which of the following statements are TRUE? Group of answer choices Dynamic equilibrium indicates that the amount of reactants a
    12·1 answer
  • Help please !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    12·2 answers
  • 5. Didderent betwen group and period.​
    11·1 answer
  • I’m extremely stuck on this, please help
    7·1 answer
  • I NEED HELP WITH THESE! PLEASEEE
    9·1 answer
  • 1.Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms then Name t
    6·1 answer
  • Among the following scenarios, which best demonstrates resilience when confronted with stress?
    6·1 answer
  • Calculate the volume needed of a stock (undiluted) solution that has a concentration of 4.2 M and is then diluted to 0.034 L of
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!