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Lubov Fominskaja [6]
2 years ago
5

The pH scale from 7 to 14 is for a(n) What .

Chemistry
1 answer:
Inessa [10]2 years ago
7 0
The pH scale from 7-14 means it is a base

A substance used to determine pH is an indicator

Commonly used acid indicator is litmus paper (aka pH paper)

Hope this helps! Let me know if you need more help!
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Which has the strongest conjugate base?
aleksandr82 [10.1K]

Answer:

Phenol.

Explanation:

Hello there!

In this case, for this question about the strength of the resulting conjugate base, it is possible for us to know that the higher the Ka (stronger aid) the weaker the conjugate base. In such a way, since the phenol has the smallest Ka (weakest acid) we infer that it has the strongest conjugate base.

In addition to the aforementioned, the reason why phenol was the answer is because the Kb of its conjugate base is the greatest due to the Kb=Kw/Ka and thus, the smaller the Ka the bigger Kb.

Regards!

5 0
3 years ago
Please help me! Two groups of students were tested to compare their speed working math problems. Each group was given the same p
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The constant variable is the math problems, the dependent variable is the calculators, and the independent variables are the students
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Balance Reaction<br><br> Al(s) + HCl(aq) —&gt; AlCl3 + H2
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Answer:

2 Al + 6 HCl ⇒ 2 AlCl₃ + 3 H₂

3 0
2 years ago
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In class we derived the Gibbs energy of mixing for a binary mixture of perfect gases. We also discussed that the same result is
GaryK [48]

Answer:

Attached below

Explanation:

Free energy of mixing = ΔGmix = Gf - Gi

attached below is the required derivation of the

<u>a) Molar Gibbs energy of mixing</u>

ΔGmix = Gf - Gi

hence : ΔGmix = ∩RT ( X1 In X1 + X2 In X2 + X3 In X3 + ------- )

<u>b) molar excess Gibbs energy of mixing</u>

Ni = chemical potential of gas

fi = Fugacity

N°i = Chemical potential of gas when Fugacity = 1

ΔG = RT In ( a2 / a1 )  

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3 years ago
Why does a scientist form a hypothesis?
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