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RUDIKE [14]
4 years ago
8

Phosphoric acid is a triprotic acid with the follow Ka values: Ka1 = 7.2x10−3, Ka2 = 6.3x10−8, Ka3 = 4.2x10−13 Based on this inf

ormation, What is the Ka of HPO42-? What is the Kb of HPO42-? Is HPO42- acidic, basic, or neutral?

Chemistry
2 answers:
german4 years ago
5 0

Answer:

A. 4.2 × 10^-13

B. 0.024

C. Acidic

Explanation:

Below is an attachment containing the solution

klasskru [66]4 years ago
3 0

Answer:

Explanation:

Step 1

Phosphoric Acid is a triprotic acid where H3PO4 dissociates to H2PO4- which then further dissociates HPO42- and it then forms PO43-. Equation for acid dissociation constant for the dissociation of H3PO4 and HPO42- can be written as above.

Step 2

Concentration of H2PO4- produces during the dissociation of H3PO4 can be determined by constructing an ICE table.

Step 3

Concentration of HPO42- produces during the dissociation of H2PO4- can be determined

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A gas sample has volume 3.00 dm3 at 101
gavmur [86]

Answer:

V₂ = 21.3 dm³

Explanation:

Given data:

Initial volume of gas = 3.00 dm³

Initial pressure = 101 Kpa

Final pressure = 14.2 Kpa

Final volume = ?

Solution;

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

101 Kpa × 3.00 dm³ = 14.2 Kpa × V₂

V₂ = 303 Kpa. dm³/  14.2 Kpa

V₂ = 21.3 dm³

Explanation:

3 0
3 years ago
Potassium carbonate, K2CO3, sodium iodide, NaI, potassium bromide, KBr, methanol, CH3OH, and ammonium chloride, NH4Cl, are solub
just olya [345]

Answer:

A. K₂CO₃

Explanation:

The chemical reaction showing the ions produced on dissolving Potassium carbonate in water is:

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Number of ions produced = 2 + 1 = 3

The chemical reaction showing the ions produced on dissolving sodium iodide in water is:

NaI ⇒ Na⁺ + I⁻

Number of ions produced = 1 + 1 = 2

The chemical reaction showing the ions produced on dissolving potassium bromide in water is:

KBr ⇒ K⁺ + Br⁻

Number of ions produced = 1 + 1 = 2

The chemical reaction showing the ions produced on dissolving ammonium chloride in water is:

NH₄Cl ⇒ NH₄⁺ + Cl⁻

Number of ions produced = 1 + 1 = 2

<u>The largest number of dissolved particles per mole of dissolved solute is produced by Potassium carbonate.</u>

5 0
4 years ago
What is the volume of 0.9 g of O2 at STP?
GREYUIT [131]
I don’t sure but I think it is Assuming that the gas is at standard temperature and pressure (STP), one mole of any gas occupies 22.4 L . This means the number of moles of O2 is 222.4=0.089 mol .
3 0
3 years ago
A student combined two colorless aqueous solutions. One of the solutions contained Na2CO3 as the solute and the other contained
Kazeer [188]

Answer:

Bubbles will be formed when two solutions will be combined.

Explanation:

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As a result of combination of the two solutions bubbles will be formed which will depict the evolution of carbon dioxide gas.

5 0
3 years ago
50 PONITS TO RIGHT AWNSERS!!!
Ivan
Distance and period of time is the correct answer

Hope this helps!
7 0
3 years ago
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