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navik [9.2K]
3 years ago
10

Differences between alkalis, bases and acids? (answer for many points :) )

Chemistry
1 answer:
Rudik [331]3 years ago
3 0

Explanation:

protons.

An acid can also be thought of as a chemical that can neutralize a base. Similarly, a base can neutralize an acid.

Acids turn litmus paper red, while bases make litmus paper turn blue.

Some examples of acids are sulfuric acid, hydrochloric acid, nitric acid, and so on. Some examples of bases are sodium hydroxide, potassium hydroxide, and so on.

Acids generally taste sour, while bases have a bitter taste.

Alkalis are the bases that are water-soluble, which means that they dissolve in water. In other words, not all bases are water-soluble, and only the water-soluble bases are known as alkalis. An example of an alkali is sodium hydroxide. It is a base because it can neutralize an acid, and because it is water-soluble, it is an alkali. An example of a base that is not alkali is copper oxide. This chemical can neutralize an acid, but it is insoluble in water.

In other words, all alkali are bases but not all bases are alkalis.

Also, an alkali has a hydroxide group, while a base has an oxide group in it.

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A balloon filled with helium has a volume of 6.9 L. What is the mass, in grams, of helium in the balloon?
balandron [24]

Answer : The mass of helium gas in the balloon is, 1.23 grams.

Explanation : Given,

Volume of helium gas = 6.9 L

First we have to calculate moles of helium gas at STP.

As we know that, 1 mole of substance occupy 22.4 L volume of gas.

As, 22.4 L volume of helium gas present in 1 mole of helium

So, 6.9 L volume of helium gas present in \frac{6.9L}{22.4L}\times 1mole=0.308mole of helium

Now we have to calculate the mass of helium gas.

\text{Mass of He gas}=\text{Moles of He gas}\times \text{Molar mass of He gas}

Molar mass of He gas = 4 g/mol

\text{Mass of He gas}=0.308mol\times 4g/mol=1.23g

Thus, the mass of helium gas in the balloon is, 1.23 grams.

6 0
3 years ago
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Nina [5.8K]

Answer:

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Explanation:

3 0
3 years ago
Propanoic acid, ch3ch2cooh, has a pka =4.9. draw the structure of the conjugate base of propanoic acid and give the ph above whi
xenn [34]

Conjugate base of Propanoic acid (CH_{3}CH_{2}COOH is propanoate where -COOH group gets converted to -COO^{1-}. The structure of conjugate base of Propanoic acid is shown in the diagram.

The p^{H} above which 90% of the compound will be in this conjugate base form can be determined using Henderson's equation as propanoic acid is weak acid and it can form buffer solution on reaction with strong base.

p^{H}= p^{k_{a}+ log\frac{[Conjugate base]}{[acid]}=4.9+log\frac{90}{10}=5.85

As 90% conjugate base is present, so propanoic acid present 10%.

8 0
4 years ago
A student prepares a mixture of sugar and coffee. The sugar seems to disappear as it mixes with the coffee.
butalik [34]

Answer:homogeneous

Explanation:

4 0
4 years ago
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HELPPPPP!!<br><br>How can more water vapor get cold over one side of an island?
Veronika [31]

Answer:

Troposphere and Atmosphere In this chapter, students learn that water vapor condenses as it moves higher to where the atmosphere is colder. This idea helps students explain why more rain forms over West Ferris than East Ferris.

Explanation:

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3 years ago
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