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3 years ago

I need help ASAP please Calculating pH See chart below

Chemistry

1 answer:

laila [671]3 years ago

5 0

Answer:

12, basic, 9, basic

Explanation:

pH = -log[H+]

Using the data in the table, you can calculate the pH:

-log[1e-12] = 12

-log[1e-9] = 9

To find out whether it is acidic, basic, or neutral, use a pH scale. Anything less than 7 is acidic, anything over is basic. Knowing this, both will be basic.

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below is a list of some weak acids: name formula pka molar mass acetic acid h(c2h3o2) 4.76 60.052 butanoic acid h(c4h7o2) 4.83 8

Genrish500 [490]

(i) Volume of point Naon to reach equivalence. = 24.0mL

(ii) volume of Naon used to reach 50% T = 12.0mL

(iii) PKA of an unknown acid = 4.8

(iv) moles of acid reacted = moles of NaOH

man/molar mass = 0.269g/MW = Molarity x volume

0.269g/MW = 0.09560 mol/K x 24. 0× $10^{-3}$ /K

MW = 0.269g/0.09560 mol x 24.0x $10^{-3}$

MW = 117.24g mol-1

(v) In matching the given table of molar masses. with obtained man matches with that, we get that it of hexanoic acid.

unknown acid = hexanoic acid

Titration is used to determine the amount of a substance present by reacting it with a known amount of another substance. For example, the molar mass of an acid can be found by titrating it with a base solution of known concentration. Your unknown solid is an acid. This is dissolved in water and phenolphthalein indicator is added and titrated to the endpoint with standard NaOH solution. Unknown acids are monobasic. There is only one acidic hydrogen per molecule.

Learn more about Molecular weight here:-brainly.com/question/837939

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5 0

2 years ago

A molecule of butane and a molecule of 2-butene both have the same total number of

Vinvika [58]

The correct answer is option 1. Butane and 2-butene have the same total number of carbon atoms. They both have four carbon atoms. They differ in there structure since the latter has double bonds on it. As a result of the different structure, they also have different properties.

8 0

3 years ago

A vector always consists of

bija089 [108]

Hope this helps A vector always consists of a direction and magnitude. F

7 0

4 years ago

How many moles of water are produced when 3.45 moles of KMnO4 react? Give your answer to the nearest 0.1 moles. moles H2O

andrew11 [14]

Answer:

13.8 moles of water produced.

Explanation:

Given data:

Moles of KMnO₄ = 3.45 mol

Moles of water = ?

Solution:

Chemical equation:

16HCl + 2KMnO₄ → 2KCl + 2MnCl₂ + 5Cl₂ + 8H₂O

Moler ratio of water and KMnO₄:

KMnO₄ : H₂O

2 : 8

3.45 : 8/2×3.45 = 13.8 mol

Hence, 3.45 moles of KMnO₄ will produced 13.8 mol of water.

7 0

3 years ago

2. Work is done only when an object. in the of the force that is being applied.

sp2606 [1]

Answer:

Whenever a force is applied to an object, causing the object to move, work is done by the force. ... Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work

3 0

3 years ago