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
stepladder [879]
3 years ago
6

When preparing the diazonium salt, the solution is tested with potassium iodide-starch paper. a positive test is the immediate f

ormation of a blue color. what is the ki-starch paper testing for ? explain?
Chemistry
1 answer:
Dahasolnce [82]3 years ago
8 0
KI-starch paper allows the detection of strong oxidizers such as nitrite. It is used here to control diazotization of 4-nitroaniline. Nitrite oxidizes potassium iodide in order to form elemental iodine which reacts with starch to a blue-violet complex. With KI-starch paper, enough sodium nitrite is added to produce nitrous acid, which <span>then will react with 4-nitroaniline to form a diazonium salt.</span>
You might be interested in
What two conditions must satisfy to be called matter ?
prohojiy [21]
I can tell you one. Must have particles
6 0
3 years ago
For the reaction 2 HCl + Na2CO3 → 2 NaCl + H2O + CO2 8.0 moles of CO2 is collected at STP. What is the volume of CO2? 1. 57.6 L
Dmitry [639]

Answer:

Option 5. 179L

Explanation:

The reaction is:

2 HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂

The amount of collected CO₂ is 8 moles.

We apply the Ideal Gases Law at STP

STP are 1 atm of pressure and 273K of T°

P . V = n . R . T

1atm . V = 8 mol .0.082L.atm/mol.K . 273K

V = (8 mol .0.082L.atm/mol.K . 273K) / 1 atm = 179 L

6 0
4 years ago
Which of the following correctly lists the name of the element, the symbol for the ion, and the name of the ion?
Yanka [14]

The correct answer is B.

Hope this helps you.

8 0
3 years ago
Read 2 more answers
A chemist requires 0.802 mol Na2CO3 for a reaction. How many grams does this correspond to?
Komok [63]

Answer:

Ok:

Explanation:

So grams = mols*MolarMass. Here, MolarMass (MM) = 105.99g which can be found using the periodic table. mols is given to be 0.802. We can then plug in to get that it corresponds to 85.0g.

7 0
3 years ago
What is the most specific classification of Ca(NO3)2
Cerrena [4.2K]
"Compound" is the one among the following choices given in the question that is the <span>most specific classification of Ca(NO3)2. The correct option among all the options that are given in the question is the second option. It is actually an inorganic compound. I hope that this is the answer that has come to your help.</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Aspartic acid is an amino acid used to synthesize proteins. There are ________ atoms with a trigonal planar geometry in the aspa
    11·1 answer
  • List two properties of mixtures
    9·1 answer
  • What is the molecular geometry of the underlined carbon atom in the following compound: HC-C-CH3?
    10·1 answer
  • What is the answer to this because I'm clueless?
    13·1 answer
  • What car do you want to have.
    8·2 answers
  • Of the following equilibria, only ________ will shift to the right in response to a decrease in volume. N2 (g) + 3H2 (g) 2NH3 (g
    7·1 answer
  • Which type of organism carries out cellular respiration
    14·2 answers
  • How many atoms are in 1.50 moles of Zinc?
    13·1 answer
  • Read the following graduated cylinder.<br> How many ML?
    14·1 answer
  • What is a property of a substance? why are properties important? Explain your answer
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!