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2 years ago

Why is acid base titration a useful technique in chemistry

1 answer:

7 0

Answer: Titration is particularly useful if we want to find out the amount or concentration of a known acid or base in a given sample.

Explanation: Suppose you have just been handed a beaker containing a fixed volume of HCL solution. If you simply just know the volume of the solution, you can titrate it against a reagent (base) to figure out the exact concentration of the solution (also known as molarity)

The solution is placed in a flask for titration and a minute amount of indicator is then added into the flask. The reagent (base) is placed in a burette and slowly added to the solution and indicator mixture. The amount of reagent used is recorded when the indicator causes a change in the color of the solution. Using Stoichiometry, we are then able to calculate the concentration and moles of the HCL solution used up in the reaction.

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What are the three main particles in the modern model of an atom

EastWind [94]

Protons and neutrons in the nucleus (the bit in the middle) and small tiny electrons that orbit the nucleus

7 0

2 years ago

a nuclide of 64/29 cu absorbs a positron. witch is the resulting atom? (A) 65/29Cu (B) 63/29 CU (C) 64/28Ni (D) 64/30 Zn

Nesterboy [21]

Answer : Option D) $Zn^{64}_{30}$

Explanation : When a positron is getting absorbed it means it will be $e^{+1}_{0}$ so, the $Cu^{64}_{29}$ will get converted;

So, the whole reaction will be;

$Cu^{64}_{29}$ + $e^{+1}_{0}$ ----> $Zn^{64}_{30}$ .

This will convert the whole element of Cu will get changed into Zn. As, it absorbs by the positron, the atomic number gets increased from 29 to 30.

4 0

2 years ago

Relative to protons, electrons have:

saw5 [17]

Answer:

<u><em>(B.) a significantly lower mass that protons</em></u>

Explanation:

The mass (in g) of an electron is 9.11 × $10^{-28}$ g, which is significantly lower than the mass of protons and neutrons which are approximately the same. They are extremely small (equal to 0 amu), contributing nothing to the overall mass of the atom.

The nucleus has a mass of 1 amu and is positively charged.

6 0

3 years ago

Can someone who expert in chemistry be my personal tutor? I'm so desperate

lions [1.4K]

Yes..? I don’t understand what you’re trying to ask mate.

5 0

3 years ago

Argon gas has a boiling point of -197 °C. Which of the following diagrams best represents the

Paha777 [63]

Answer:

(a)

Explanation:

Hello,

In this case, the temperature required to boil argon, it means, transform it from liquid to gas is -197 °C. In such a way, since the temperature inside the steel sphere is -190 °C, which is greater than the boiling point, we realize argon is gaseous, therefore, the molecules will be spread inside the sphere as they will be moving based on the kinetic theory of gases.

For that reason, answer is scheme (a).

Best regards.

6 0

3 years ago