CHEMISTRY MIDDLE SCHOOL

when an iron nail is placed in an aqueous solution of copper(ii)sulphate,a reaction take place.construct an ionic equation for reaction?​

Answers

Answer 1
Answer:

The net ionic equation for this reaction is Fe(s) \ + \ Cu^(2+)(aq) \ \rightarrow \ Fe^(2+)(aq) \ + \ Cu(s). In ionic equations the soluble compounds are written in their dissociated ion forms. The ionic equation can be determined by knowing the general solubility rules.  In this problem there are sulfate compounds involved. It is important to know that sulfates are generally soluble except for sulfates of Ba, Pb, Ag, and Sr. Therefore, the ones dealt with in this problem, CuSO4 and FeSO4, are both soluble in water.

Further Explanation:

The complete equation for this reaction is:

Fe(s) \ + \ CuSO_(4)(aq) \rightarrow \ FeSO_(4)(aq) \ + \ Cu(s)

CuSO4 and FeSO4 are soluble in water which will lead to the ionic equation:

Fe(s) \ + \ Cu^(2+)(aq) \ + \ SO_(4)^ {2-}(aq) \ \rightarrow \ Fe^(2+)(aq) \ + \ SO_(4)^(2-)(aq) \ + \ Cu(s)

Since the sulfate ion appears on both sides, it is a spectator ion. Spectator ions are unchanged in the chemical reaction and are removed from the net ionic equation:

\boxed {Fe(s) \ + \ Cu^(2+)(aq) \ \rightarrow \ Fe^(2+)(aq) \ + \ Cu(s)}

Based on the net ionic equation it can be seen that this is a reduction-oxidation reaction. Iron was oxidized and copper was reduced.

Learn More

  1. Learn more about solubility rules brainly.com/question/11617954
  2. Learn more about redox reactions brainly.com/question/2388654
  3. Learn more about chemical equations brainly.com/question/6976143

Keywords: ionic equation, solubility

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A tank has 30 gallons of gasoline how many liters of gasoline are there in the tank

Answers

Answer:

113.55 l

Explanation:

1 gallon equals 3,785 liters.

How many liters are in 30 gallons?

We apply a simple rule of three to solve it

1 gallon \longrightarrow 3.785 l\n 30 gallons \longrightarrow x \n x=((30 gallons)(3.785l))/(1 gallon)= 113.55 l.

Answer: I think it is: 113.5624 Liters of gas

Explanation:

You place ice cubes into a glass of lemonade what happens to make the lemonade to get cold

Answers

When we place ice cubes into a glass of lemonade then transfer of thermal energy from lemon water to ice cubes takes place.

What is transfer of energy?

Transfer of energy means the transformation of energy from one form to another form or from one place to another place.

When we place ice cubes into a glass of lemonade, as we know that the temperature of ice cubes is low and it has low thermal energy and the temperature of lemonade is high and have a high thermal energy as compared to ice cubes. In this condition thermal energy goes from lemonade to the ice cube till they both have same thermal energy.

Hence, transfer of thermal energy takes place.

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The heat energy from the room temperature lemonade transfers to the cold ice cubes, causing the temperature of the lemonade to drop and the temperature of the ice cube to rise until they are equal to each other.

A condor has a wing span of 3.05 m. What is the wing span in feet

Answers

Answer:

The condor has a wing span of 10 feet

Explanation:

This can be solved by a simple rule of three

In a rule of three problem, the first step is identifying the measures and how they are related, if their relationship is direct of inverse.

When the relationship between the measures is direct, as the value of one measure increases, the value of the other measure is going to increase too. In this case, the rule of three is a cross multiplication.

When the relationship between the measures is inverse, as the value of one measure increases, the value of the other measure will decrease. In this case, the rule of three is a line multiplication.

In this problem, our measures are the wing span of the condon in meters and the wing span of the condor is feet. As the value of one of these measures increases, the other is going to increase too.

We know that 1m has 3.281 feet,

So we have the following rule of three:

1m - 3.281 feet

3.05m - x feet

x = 3.821*3.05

x = 10 feet

The condor has a wing span of 10 feet

What is the empirical formula of sulphur dioxide which contains 50% by mass of sulphur​

Answers

Answer:

Empirical formula is SO2.

Explanation:

So the fraction of Sulphur is 0.50 and the fraction of  oxygen is 0.50.

Dividing by the atomic masses of sulphur and oxygen:

S = .50 / 32 = 0.015625

O = .50 / 16 = 0.3125

Ratio of S: O =     0.015625/ 0.015625 to 0.3125/ 0.015625    

= 1:2.

Answer:

Question what are you doing the same thing you guys have a good time

Explanation:

is this the same question why did they do that and how much they do it

if a gas occupies at 5.40 L at a pressure of 1.25atm, what will be its volume at a pressure of 3.00 atm? (Show work)

Answers

Answer:

Explanation:

Givens

P = 1.25 atm

V = 5.4 L

P1 = 3 atm

V1 = ??

Formula

The basic formula is P*V = P1 * V1

Solution

1.25 * 5.4 = 3 * V1

6.75 = 3*V1

6.75 /3 = 3*V1/3

2.25 = V1

1. In this investigation you will use a Mohr pipette to measure volume. Mohr pipettes use initial and final readings to determine the volume delivered. Explain how to avoid bias in the volume readings.2. You will be preparing a standard solution by mixing two solutions: 0.200 M Fe(NO3)3 and 0.00200 M KSCN. The concentration of the M Fe(NO3)3 solution is 100 times greater than the concentration of KSCN solution. What is the purpose of using a large concentration of Fe(NO3)3 and a small concentration of KSCN to make the standard solution? Explain.

Answers

Answer:

(a) Avoid parallax error

(b) To ensure that almost all the SCN⁻ has reacted.

Explanation:

(a) Avoiding bias

A Mohr pipet is a graduated pipet. To avoid bias, you should always hold the pipet so the meniscus is at eye level.

If your eye is above or below the meniscus, you will get an incorrect reading of the volume.

(b) Excess Fe³⁺

I am guessing that you are adding different volumes of SCN⁻ to Fe³⁺ to generate a Beer's Law plot of the concentration of FeSCN²⁺.

The problem is that the reaction is an equilibrium  It does not go to completion.

Fe³⁺ + SCN⁻ ⇌ FeSCN²⁺

You use a large excess of Fe³⁺ to drive the position of equilibrium to the right and make sure that almost all the added SCN⁻ is converted to FeSCN²⁺.
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