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MA_775_DIABLO [31]
4 years ago
10

Please answer my Chemistry questions. Thanks.

Chemistry
1 answer:
eimsori [14]4 years ago
6 0
1. False
2. Magnesium
3. True
4. LiF
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what is the ph of a 1.8 m solution of a weak acid ha, with a ka of 9.55×10−10? the equilibrium expression is: ha(aq) h2o(l)⇋h3o
sesenic [268]

The pH of the solution is 4.38.

<h3>What is the pH?</h3>

The first thing that we must do is to set up the ICE table for the reaction as shown;

Given that;

HA = 1.8 M

        HA(aq) + H2O(l) ⇔ H3O^+(aq) + A^-(aq)

I         1.8                                  0                0

C         - x                                 +x                +x

E       1.8 - x                                  x                  x

K = [H3O^+] [A^-]/[HA]

9.55 × 10^−10 = x^2/0.0158 - x

9.55 × 10^−10(1.8 - x ) = x^2

1.719 * 10^-9 - 9.55 * 10^-10x = x^2

x^2 + 9.55 * 10^-10x - 1.719 * 10^-9 = 0

x=0.000041 M

pH = -log(0.000041 M)

pH = 4.38

Learn more about pH:brainly.com/question/15289741

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2 years ago
Describe meteor showers​
IgorLugansk [536]

Answer:

a rain of asteroids coming from space

Explanation:

4 0
3 years ago
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PLEASE HELP MEEEEEEEEEEEEEEEEEEEEEEE
Genrish500 [490]

Answer:

Liquid

Explanation:

Gas is too far away, solid is close but it is not in a random pattern

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3 years ago
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What is the pH of a solution with a 1.50x10-9 M hydroxide ion concentration?
dimaraw [331]

Answer: 5.18

Explanation:

Mathematically, pOH is expressed as

pH = -log(OH-)

where OH-is the concentration of hydroxide ion

So, pOH calculations are as follows

pOH = -log(1.50x10-9 M)

pOH = -(-8.82)

pOH = 8.82 [the two minus signs cancelled out]

Since pOH = 8.82; apply the formula

pH + pOH = 14 to get pH of the solution

Hence, pH + pOH = 14

pH + 8.82 = 14

pH = 14 - 8.82

pH = 5.18

Thus, the pH of a solution with a 1.50x10-9 M hydroxide ion concentration is 5.18 (slightly acidic)

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4 years ago
Which of the following is an ionic compound?
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<span> Magnesium chloride is the answer to this question


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