Help pls!!!!!!!!!!!!!!!!!!!!!!!!!!

How could you use these solutions to determine the identities of each metal powder?

Anastaziya [24]

Answer:

1.) The nitric acid solution will oxidize and thus dissolve _*(Zn and Pb)*_. This will allow to identify _**Pt**_.

2) To distinguish between _*(Zn and Pb)*_, we can use the nickel nitrate.

3) The nickel nitrate solution will oxidize and thus dissolve _**Zn**_ and will not oxidize or dissolve _**Pb**_.

Explanation:

1) Unlike Zinc and Lead, Platinum does not react with Nitric acid. So, it will be the only metal from step 1 that doesn't react. Pt is identified in this manner.

2) Nickel is higher than Lead in the activity series, but Zinc is higher than both of them in the activity series. This selectivity can be used to distinguish between Zinc and Lead metal powders.

3) Because Zinc is higher than Nickel in the activity series, it means that Zinc metal can and will displace Nickel from Nickel Nitrate solution. Therefore the Nickel Nitrate solution will oxidize and dissolve the Zinc metal.

But, there will be no reaction with the Lead metal powders sample as Pb is lower than Ni in the activity series, so, Nickel Nitrate solution will not oxidize or dissolve the Lead metal powders.

5 0

3 years ago

What kind of heat is it when you cook an egg in a frying pan?

USPshnik [31]

I may be totally wrong but I’ll make a guess to it being thermodynamics.

5 0

3 years ago

what is the electrons, valence electrons, and electron shells number please answer all 3 questions (look at the picture)

MariettaO [177]

In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

<h3>What is Electrons, Valence Electrons, and Electron Shells Numbers?</h3>

<u>Electrons</u>:

An electron is a negatively charged particle which can be either bounded with to an atom. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure.

<u>Valence Electrons:</u>

Valence electrons are those electrons which are present in outermost shell or in valence shell or energy level of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.

<u>Electron Shells Numbers</u>:

Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.

So we can conclude that In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

Learn more about Valence Electrons here: brainly.com/question/371590

#SPJ1

4 0

1 year ago

Which of the following are examples of a physical property of matter? Select all that apply.

NemiM [27]

Answer:

what are the options i cant see em

Explanation:

6 0

3 years ago

Consider the following balanced redox reaction:2CrO₂⁻(aq) + 2H₂O(l) + 6ClO⁻(aq) →

LUCKY_DIMON [66]

The balanced redox reaction are given below

2CrO₂⁻(aq) + 2H₂O(l) + 6ClO⁻(aq) →2CrO₄²⁻(aq) + 3Cl₂(g) + 4OH⁻(aq)

The Cl species is oxidizing agent .

There are following steps involve in balanced redox reaction in basic medium .

Divide the reaction into two half reactions .

Balance the elements other than oxygen and hydrogen .

Balance the oxygen atom by adding $H_{2} O$ .

Balance the hydrogen atom by adding $H^{+}$ .

Balance the charge by adding $e^{-}$ .
Add $OH^{-}$ on both side
Neutralize by combing $OH^{-}$ and $H^{+}$ .

Add the half reaction and simply .

The species which reduces the other species in the redox reaction is called oxidizing agent . Similarly , the species which oxidize the other species in the redox reaction is called reducing agent .

To learn more about oxidizing agent please click here ,

brainly.com/question/10547418

#SPJ4

7 0

1 year ago