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kondaur [170]
3 years ago
14

Why does the pink color, which forms at the point where NaOH comes into contact with the solution (HCl) in the flask, disappear

more slowly near the endpoint?
Chemistry
1 answer:
Novay_Z [31]3 years ago
4 0
Answer is: because pH value of solution is changing.
Balanced chemical reaction: NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l).
pH of sodium hydroxide solution is above seven (basic), when solution of hydrochloric acid is added, pH slowly dropping until it became neutral solution (pH is equal seven) and that is endpoint of titration.
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The volume of a gas filled balloon is 22L at 313K and 1.5 atm. What would the volume be at 273K and 1 atm?
avanturin [10]
<h3></h3>

From the calculations and the statement of the general gas equation, the volume of the gas becomes 28.8 L

<h3>What are gas laws?</h3>

The gas laws are used to show the relationship between the variables in problems that has to do with gases.

In this case, we have to apply the general gas law as follows;

P1V1/T1 = P2V2/T2

P1V1T2 = P2V2T1

V2 =   * 22L *  1.5 atm * 273K/313K * 1 atm

V2 = 28.8 L

Learn more about gas laws:brainly.com/question/12667831

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7 0
3 years ago
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astra-53 [7]
H:O = 4:5; (UO₂)₂ = 4 O atoms; (PO₄)₂ = 8 O atoms: 8H₂O = 16 H atoms + 8 O atoms; Total = 16 H atoms + 20 O atoms; H:O = 16:20 = 4:5
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4 years ago
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How many atoms are present in 9.8g of H2SO4​
aleksley [76]

Answer:

Explanation:

98 gH

2

​

SO

4

​

contains1 mole of H

2

​

SO

4

​

.

1 mole of H

2

​

SO

4

​

contain=1 mole of sulphur atoms.

∴9.8 g of H

2

​

SO

4

​

contain =0.1 mol of sulphur atom.

Thus, number of sulphur-atoms =n×N

A

​

(in 9.8 g of H

2

​

SO

4

​

)

=0.1×6.023×10

23

=0.6023×10

23

.

7 0
3 years ago
Chemistry question, 20 points, will mark as brainliest if correct:
Brums [2.3K]

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CS2 + 3O2 -> CO2 + 2SO2

Explanation:

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2 years ago
Express (3 x 104) (4 x 1023) in scientific notation
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1 x 10^28 this what the <span>scientific notation</span>
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4 years ago
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