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makkiz [27]
3 years ago
11

Plzz help me with these questions....!!!

Chemistry
1 answer:
exis [7]3 years ago
7 0

Answer:-

1) The pH of sodium bicarbonate will be around 8 as it is slightly basic. So the color will be blue.

2) The correct method for finding the pH of a solution is to use a dropper and drop wise add the solution to the pH paper lying on a glass tile. Hence the answer is 3.

3) HCl is an acid. The pH of HCl should be 1-2. NaOH is a base. It’s pH should be around 13-14.

KCl is a salt of a strong acid and strong base. It should have pH near 7. Distilled water has pH of 7. So the solutions with equal pH are KCl and distilled water. So the answer is number 4 (B and D).

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REY [17]
The half-life of any substance is the amount of time taken for half of the original quantity of the substance present to decay. The half-life of a radioactive substance is characteristic to itself, and it may be millions of years long or it may be just a few seconds.

In order to determine the half-life of a substance, we simply use:
t(1/2) = ln(2) / λ

Where λ is the decay constant for that specific isotope.
8 0
3 years ago
Which type of substance ionizes completely and creates hydronium ions when dissolved in water?
maw [93]

Answer:

Strong acid

Explanation:

An acid is a substance that interacts with water to produce excess hydroxonium ions in an aqueous solution.

Hydroxonium ions are formed as a result of the chemical bonding between the oxygen of water molecules and the protons released by the acid due to its ionisation. This makes aqueous solution of acids conduct electricity.

A strong acid is one that ionizes almost completely. Examples are:

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3. Trioxonitrate (V) acid

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8 0
3 years ago
Read 2 more answers
As shown by the periodic table, why do the elements potassium and sodium have similar chemical properties?
nadya68 [22]
Hey mate
This is the answer

The elements potassium and sodium have similar chemical properties because they have the same number of valence electrons and form +1 ions.

Plsssssss mark me as brainliest
3 0
2 years ago
Based on the following electronegativity values, which of the following best explains the polarity of the bond formed?
kvv77 [185]

Answer:

see the pic for the answer

3 0
3 years ago
What is the degree of oxidation of a simple substance​​
marissa [1.9K]

Answer: The oxidation state of a free element (uncombined element) is zero. For a simple (monoatomic) ion, the oxidation state is equal to the net charge on the ion. For example, Cl– has an oxidation state of -1. When present in most compounds, hydrogen has an oxidation state of +1 and oxygen an oxidation state of −2.

hope this helps........ Stay safe and have a Merry Christmas!!!!!!!!! :D Explanation:

8 0
3 years ago
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