Mengapa besi lebih dahulu ditemukan daripada natrium?

Which is a method that can be used to separate the components of a solution?

sashaice [31]

Answer:

Distillation

Explanation:

i hope this helps

4 0

4 years ago

Considering the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) Which ion would NOT be present in

Allisa [31]

Answer:

The question is incomplete and confusing.

In the complete ionic equation you write all the ions that are formed. Those are: Pb²⁺, NO₃⁻, K⁺, and I⁻. They all are present in the complete ionic equation.

In the net ionic equation, the spectator ions do not appear. They are: NO₃⁻ and K⁺. They would not be present in the net ionic equation, but they do in the complete ionic equation.

See below the details.

Explanation:

Which compound will not form ions?

1. Write the balanced molecular equation:

Pb(NO₃)₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq)

2. Write the ionizations for the ionic aqueous compounds:

Pb(NO₃)₂(aq) → Pb⁺²(aq) + 2NO₃⁻(aq)

2KI(aq) → 2K⁺(aq) + 2I⁻(aq)

2KNO₃(aq) → 2K⁺(aq) + 2NO₃⁻(aq)

3. Write the complete ionic equation:

Pb⁺²(aq) + 2NO₃⁻(aq) + 2K⁺(aq) + 2I⁻(aq) → PbI₂(s) + 2K⁺(aq) + 2NO₃⁻(aq)

Hence, since PbI₂(s) does not ionize, but stays in solid form, it will not form ions.

All, Pb⁺², NO₃⁻, K⁺, and I⁻ will be present in the total ionic equation.

It is in the net ionic equation that the spectator ions are removed. Those, are NO₃⁻ and K⁺, because they are on both sides of the complete ionic equation.

3 0

3 years ago

How is a stem a helpful part of a plant

myrzilka [38]

It keeps the plant upright, and it provides nutrients

5 0

3 years ago

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Which of the following liquids would have the highest viscosity at room temperature?

Liono4ka [1.6K]

Answer:

5)HOCH2CH2OH

Explanation:

This is also known as ethylene glycol. An increase in hydrogen bonds of a compound means an increase in the viscosity. Hydrogen bonds occur as a result of bonding with electronegative elements such as Oxygen, Nitrogen etc.

The compounds with the highest amount of Hydrogen bond represents the one with the highest viscosity which is B) HOCH2CH2OH

3 0

3 years ago

For the following reaction, 6.80 grams of hydrochloric acid are mixed with excess iron. The reaction yields 8.51 grams of iron(I

Orlov [11]

Answer:

A. 11.83g

B. 71.9%

Explanation:

We'll begin by writing the balanced for the reaction. This is shown below:

Fe + 2HCl —> FeCl2 + H2

A. Step 1

Determination of the mass of HCl that reacted and the mass of FeCl2 produced from the balanced equation. This is illustrated below:

Molar Mass of HCl = 1 + 35.5 = 36.5g/mol

Mass of HCl from the balanced equation = 2 x 36.5 = 73g

Molar Mass of FeCl2 = 56 + (35.5x2) = 56 + 71 = 127g

Summary:

From the balanced equation above,

73g of HCl produced 127g of FeCl2.

A. Step 2:

Determination of the theoretical yield of FeCl2.

The theoretical yield of FeCl2 can be obtained as follow:

Fe + 2HCl —> FeCl2 + H2

From the balanced equation above,

73g of HCl produced 127g of FeCl2.

Therefore, 6.80g of HCl will produce = (6.80 x 127)/73 = 11.83g of FeCl2.

Therefore, the theoretical yield of FeCl2 is 11.83g

B. Determination of the percentage yield.

Actual yield = 8.51g

Theoretical yield = 11.83g

Percentage yield =?

Percentage yield = Actual yield/Theoretical yield x100

Percentage yield = 8.51/11.83 x100

Percentage yield = 71.9%

Therefore, the percentage yield of FeCl2 is 71.9%

5 0

3 years ago

Read 2 more answers

Mengapa besi lebih dahulu ditemukan daripada natrium?​

Mengapa besi lebih dahulu ditemukan daripada natrium?