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
Pani-rosa [81]
3 years ago
14

Identify some other substances (besides KCl) that might give a positive test for chloride upon addition of AgNO3. Based on the r

eactant used in your experiment, do you think it is reasonable to exclude these types of substances as contaminants that would give a false positive when you tested your reaction residue to verify that it is KCl?
Chemistry
1 answer:
SashulF [63]3 years ago
3 0

Answer:

Other substances that give a positive test with AgNO3 are other chlorides present, iodides and bromide. However iodides and bromides have different colours hence they will not give a false positive test for KCl. Other chlorides present may lead to a false positive test for KCl.

Explanation:

In the qualitative determination of halogen ions, silver nitrate solution is used. Various halide ions give various colours of precipitate with silver nitrate. Chlorides yield a white precipitate, bromides yield a cream precipitate while iodides yield a yellow precipitate. All these ions or some of them may be present in the system.

However, if other chlorides are present, they will also yield a white precipitate just as KCl leading to a false positive test for KCl. Since other halogen ions yield precipitates of different colours, they don't lead to a false test for KCl. We can exclude other halides from the tendency to lead us to a false positive test for KCl but not other chlorides.

You might be interested in
What is the total pressure (in atm) inside of a vessel containing N2 exerting a partial pressure of 0.256 atm, He exerting a par
Bezzdna [24]

Answer: Total pressure inside of a vessel is 0.908 atm

Explanation:

According to Dalton's law, the total pressure is the sum of individual partial pressures. exerted by each gas alone.

p_{total}=p_1+p_2+p_3

p_{N_2} = partial pressure of nitrogen = 0.256 atm

p_{He} = partial pressure of helium = 203 mm Hg = 0.267 atm  (760mmHg=1atm)

p_{H_2} = partial pressure of hydrogen =39.0 kPa = 0.385 atm  (1kPa=0.00987 atm)

Thus p_{total}=p_{H_2}+p_{He}+p_{H_2}

p_{total} =0.256atm+0.267atm+0.385atm =0.908atm

Thus total pressure (in atm) inside of a vessel is 0.908

8 0
3 years ago
Read 2 more answers
What is the best description of weathering?
zheka24 [161]
D. breakdown of rocks through mechanicals or chemicals processes
8 0
3 years ago
What happened after the gas syringe was inserted into the flask with the methane gas?
ad-work [718]
When a syringe  is  inserted  into    the  flask  containing  methane  gas  the  plunger  of  the  syringe  is  raise  up.  This  led  to  filling  of  the  syringe  with  the  gas.This  relate  to  Charles  law   which  explain how  gas  expand with  increase  in  temperature.
7 0
3 years ago
Before a child takes a bath, his mother mixes bubbles into bath water. Physical or Chemical Change?
NeX [460]

Answer:

chemical

Explanation:

6 0
3 years ago
10 atoms of aluminum reacts with 6 molecules of oxygen gas to produce aluminum oxide. 4 Al + 3 O2 ––> 2 Al2O3 What is the exc
Mrrafil [7]

The excess reactant is Aluminum.

<u>Explanation:</u>

We have to write the balanced equation as,

4 Al+ 3 O₂ → 2 Al₂O₃

According to the molar ratio 4: 3, from the given balanced equation, we can say that 4 atoms of Al reacted with 3 molecules of oxygen.

Given that 10 atoms of aluminum reacts with 6 molecules of oxygen, as per the ratio only 8 atoms of Aluminum is required to react with 6 molecules of oxygen, so excess reactant is Aluminum.

8 0
3 years ago
Other questions:
  • What is the main component of the earths ancient atmosphere?
    13·1 answer
  • A scientist measures the standard enthalpy change for the following reaction to be -327.2 kJ : P4O10(s) 6 H2O(l)4H3PO4(aq) Based
    15·1 answer
  • What is thr pH of a solution of NaCl that has [H+] = 1.00 × 10-7 M
    8·2 answers
  • 5.0 gram of anhydrous calcium carbonate is reacted with an excess of dilute nitric acid. if the reaction is carried out at 25 de
    5·1 answer
  • The combustion of propane may be described by the chemical equation C 3 H 8 ( g ) + 5 O 2 ( g ) ⟶ 3 CO 2 ( g ) + 4 H 2 O ( g ) C
    8·1 answer
  • Explain why bond angle of H2O is greater than OF2
    7·1 answer
  • One mole of which of these compounds contains two moles of hydrogen atoms? f NaOH g H2S h CH4 j NH3
    10·1 answer
  • Explain how you were able to use your knowledge of how different types of blood react with anti A, anti B, and anti Rh antibodie
    14·1 answer
  • Please answer my question, and please no random things, thank you!! It is not F, That is all I know.
    15·2 answers
  • A sample of ch4o with a mass of 32.0 g contains __________ molecules of ch4o. group of answer choices 5.32 ´ 10-23 1.00 1.88 ´ 1
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!