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
jeka57 [31]
3 years ago
5

The labels have fallen off three bottles containing powdered samples of metals; one contains zinc, one lead, and the other plati

num. you have three solutions at your disposal: 1 m sodium nitrate, 1 m nitric acid, and 1 m nickel nitrate. how could you use these solutions to determine the identities of each metal powder?
Chemistry
1 answer:
Alinara [238K]3 years ago
8 0

Here we have to identify the metal powder by the given disposal.

The identification of Zinc can be done by 1 m nitric acid (HNO₃) and Ni(NO₃)₂ which will produce hydrogen gas by reaction and displacement reaction as shown below.

Zn + 2 HNO₃ = Zn(NO₃)₂ + H₂ (g)

Zn + Ni(NO₃)₂ = Zn(NO₃)₂ + Ni

The identification of lead can be done by the reaction with 1 m nitric acid (HNO₃) which produces lead nitrate.

The reaction is-

Pb + 4HNO₃ = Pb(NO₃)₂ + 2NO₂ + 2H₂O

The identification of platinum can be done by the reaction with all the given disposal as it will not react with any of the compound.

1. Identification of Zinc (Zn):

(a) Zn metal will not react with sodium nitrate (NaNO₃) as sodium remains at the lower position of the activity series than zinc.

Zn + NaNO₃ = No reaction

(b) Zn metal will react with 1 m HNO₃ to form hydrogen gas. The reaction is:

Zn + 2 HNO₃ = Zn(NO₃)₂ + H₂ (g)

(c) Zn will react with nickel nitrate [Ni(NO₃)₂] because it may only cause displacement reaction the reduction potential of Zn²⁺/Zn (-0.76) is less than that of Ni²⁺/Ni (-0.23). Thus the reaction will be:

Zn + Ni(NO₃)₂ = Zn(NO₃)₂ + Ni

2. Identification of lead (Pb):

(a) Pb metal will not react with sodium nitrate (NaNO₃) as sodium remains at the lower position of the activity series than Pb.

Pb + NaNO₃ = No reaction

(b) Pb reacts with HNO₃ to form lead nitrate. The reaction is:

Pb + 4HNO₃ = Pb(NO₃)₂ + 2NO₂ + 2H₂O

(c) The standard reduction potential of Pb²⁺/Pb is more than nickel Ni²⁺/Ni thus there will be no reaction between Pb and NI(NO₃)₂.

Pb + Ni(NO₃)₂ = No reaction.

3. Identification of platinum (Pt)

(a) Pt metal will not react with sodium nitrate (NaNO₃) as sodium remains at the lower position of the activity series than Pt.

Pt + NaNO₃ = No reaction.

(b) The standard reduction potential of Pt²⁺/Pt is so high (+1.188) thus there will be no reaction with HNO₃.

Pt + HNO₃ = No reaction

(c) The standard reduction potential of Pt²⁺/Pt is more than nickel Ni²⁺/Ni thus there will be no reaction between Pt and Ni(NO₃)₂.

Pt +  Ni(NO₃)₂ = No reaction.    

You might be interested in
help, Look at the model below. Explain what is correct and/or incorrect about the model based on scale, proportion, and quantity
stiks02 [169]
One correct thging is that there are the same amount of positive and negative atoms
6 0
2 years ago
Please help in Chemistry!!!! 15 points! I added a picture below...
krek1111 [17]
The answer would be choice B because the energy decreased by 20 J
5 0
3 years ago
Read 2 more answers
A neutral atom posseses an atomic number of 15 and an atomic mass of 31 3 electrons are gained
kodGreya [7K]

Answer:I believe the correct answer from the choices listed above is option D. A

Explanation:neutral atom possesses an atomic number of 15 and an atomic mass of 31.Three electrons are gained. This conversion results to a negatively charged ion.

8 0
3 years ago
What are two ways in which density has practical importance?
Marta_Voda [28]
<span>density is how much matter is packed into one area. so the higher density the more likely it is to be heavier. for example, cork has a very low density and iron has a higher density.</span>
6 0
3 years ago
Which value of x from the set {4, 5, 6, 7), makes this equation true?
irina [24]
C and d is the answer
3 0
3 years ago
Read 2 more answers
Other questions:
  • 5.40 g B determine the number of atoms
    14·1 answer
  • Gases have unique properties because the distance between gas particles
    11·1 answer
  • Determine the mass in grams of 3.00 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is 74.92 g.)
    11·1 answer
  • You give a sample containing .90 moles of a substance
    7·1 answer
  • An element has two isotopes. 90% of the isotopes have a mass number of 20 amu, while 10% have a mass number of 22 amu. Calculate
    13·1 answer
  • Penny has a pencil that is 19 cm long. How long the pencil In inches
    6·2 answers
  • A 1.19 g sample of an unknown halogen occupies 109 mL at 398 K and 1.41 atm. What is the identity of the halogen
    9·1 answer
  • Determine whether each of the examples represents a colligative property or a non-colligative property. boiling point elevation
    15·1 answer
  • If you diluted 120 mL of 1,049 M NaCl to 1,920 mL, what would
    15·1 answer
  • Draw the structures of the following covalent molecules.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!