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Andrews [41]
4 years ago
6

When a diprotic acid, , is titrated with , the protons on the diprotic acid are generally removed one at a time, resulting in a

pH curve that has the following generic shape: Notice that the plot has essentially two titration curves. If the first equivalence point occurs at 100.0 mL added, what volume of added corresponds to the second equivalence point? Volume = mL For the following volumes of added, list the major species present after the reacts completely.
Chemistry
1 answer:
marshall27 [118]4 years ago
4 0

Answer:

At the second equivalent point 200 mL of NaOH is required.

Explanation:

at the first equivalent point:

                              H2A    +     OH-       =     HA-  +     H2O

initial mmoles        y*100         y*100            -                -

final mmoles            0                0                 y*100       y*100

at the second equivalent point:

                              HA-    +     OH-       =     A2-  +     H2O

initial mmoles        y*100         y*100            -                -

final mmoles            -                -                 y*100       y*100

at the second equivalent point we have that y*100 mmoles of NaOH or 100 mL of NaOH ir required, thus:

at the second equivalent point 200 mL of NaOH is required.

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Two balloons are charged with an identical quantity and type of charge: 0.004 C. They are held apart at a separation distance of
lukranit [14]

Answer:

The answer to your question is F = 28800 N

Explanation:

Data

q₁ = q₂ = 0.004 C

distance = r = 5 m

k = 9x 10⁹ C

Force = F

Formula

F = k q₁ q₂ / r²

-Substitution

F = (9 x 10⁹)(0.004)(0.004) / (5)²

-Simplification

F = 144000 / 25

-Result

F = 28800 N

-Conclusion

The force of repulsion between these balloons is 28800 N

6 0
4 years ago
How many grams of ZnO would you need to produce 50 g of ZnCl2? (The atomic mass of Zn is 65.38 and of Cl is 35.45.)
vagabundo [1.1K]

ZnO(s) + 2HCl(aq) → ZnCl2 (s) + H2O(l)

Look at the moles:

1 + 2 → 1 + 1

How much ZnO do we need to make 50g of ZnCl2? Notice it is these numbers in () and should be 1:1

(1) + 2 → (1) + 1

So we need the same number of moles, but how many moles is 50g of ZnCl2? Zn weight is 65.38g, and Cl is 35.45g. So ZnCl2 is (65.38) + (2 X 35.45)=136.28g

50g/136.28g = 0.3669 moles

What is 0.3669 moles of ZnO now?

O weighs 16g/mol, so add 65.38 + 16 = 81.38

Multiply by 0.3669 moles and get how many grams we need.

7 0
3 years ago
Photosynthesis is the chemical process in which plants and other organisms
-Dominant- [34]

Answer:

sugar and oxygen

Explanation:

sugar (glucose) and oxygen

7 0
2 years ago
How much heat is required to raise the temperature of 65.8 grams of water from 31.5ºC to 46.9ºC?
vodomira [7]

Answer: 1,013.32 cal × 4.18 J/cal = 4,235.68 J

Explanation:

1) Data:

Water ⇒ C = 1 cal/g°C

m = 65.8 g

Ti = 31.5°C

Tf = 36.9°C

Heat, Q = ?

2) Formula:

Q = mCΔT

3) Calculations:

Q = 65.8g × 1 cal/g°C × (46.9°C - 31.5°C) = 1,013.2 cal

4) You can convert from calories to Joules using the conversion factor:

1 cal = 4.18 J

⇒ 1,013.32 cal × 4.18 J/cal = 4,235.68 J

3 0
3 years ago
A student places 6.00 cups of water in a beaker. Two cups of water have the weight of 1.00 pounds. How much heat is needed to ra
vivado [14]

A

Explanation:

The awnser is a

8 0
3 years ago
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