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zhenek [66]
3 years ago
8

Name two chemicals that can be used to prepare a standard solution in the Laboratory​

Chemistry
1 answer:
pantera1 [17]3 years ago
6 0

Answer:

Two chemicals that can be used to prepare standard solutions in lab are Hydrochloric acid & Sulphuric acid.

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When 20.0 mL of an acetic acid (CH3COOH) solution is titrated with a 0.0610 M sodium hydroxide (NaOH) solution, the equivalence
Zolol [24]

Answer:

Solution that is 0.100 M CH3COOH (acetic acid)

and 0.100 M NaCH3COO (sodium acetate)

Find pH of buffer solution:

CH3COOH(aq) + H2O ↔ CH3COO-

(aq) + H3O+(aq)

[CH3COOH] [CH3COO-

] [H3O+]

initial 0.100 0.100 ≈0

-x x x

equil 0.100 – x 0.100 + x xFind pH of buffer solution:

CH3COOH(aq) + H2O ↔ CH3COO-

(aq) + H3O+(aq)

Ka = [CH3COO-

][H3O+

]

[CH 3COOH] = (.100 + x)x

(.100 - x) = 1.8 x 10-5

x = 1.80 x 10-5 M

pH = 4.7

Explanation:

4 0
3 years ago
No, since the slopes are different.
beks73 [17]

Option C, slopes are same but y intercepts are different is the correct answer

5 0
3 years ago
How many moles are in 635 grams of LiOH?
Dafna11 [192]

Answer:

the answer is 0.041756547635452 we assume you are coverting between moles LiOH and gram

Explanation:

you can view details on each measurements units:monecular weight of LiOH or grams this compound is also known as lithium hydroxide the si base unit for amount of substance is the moles1 moles qual1 moles LiOH..... Sana makatulong sayo lods ang answer ko

5 0
3 years ago
How is it possible for helium to have 8 spectral lines when it only has 2 electrons?
neonofarm [45]

It has more lines in it compared to hydrogen emission spectrum. It is mainly because the helium atom has more electrons than a hydrogen atom. Therefore, more electrons get excited when we pass a white light beam through a helium sample, and it causes the emission of more spectral lines

5 0
3 years ago
The central atom in ________ does not violate the octet rule. the central atom in ________ does not violate the octet rule. sf4
ruslelena [56]

We have to know which do not violet octet rule.

The central atom in SF₄ does not violate the octet rule. the central atom in CF₄ does not violate the octet rule.

As per octet rule, atoms can combine either by transfer of valence electrons from one atom to another or by sharing of valence electrons in order to have an octet in their valence shell.

The central atom S of SF₄ contains 8 electrons in the valence shell. Also, C atom of CF₄ contains 8 electrons in the valence shell.

ICl₄⁻ contains 9 electrons in the outermost shell.

7 0
3 years ago
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