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Lady bird [3.3K]
3 years ago
5

Why does stirring increase the rate of dissolution?

Chemistry
2 answers:
vredina [299]3 years ago
8 0
The only option that makes sense is D). Stirring will increase the contact between solute and solvent.
gavmur [86]3 years ago
5 0

The correct option is D.

When dissolving a substance in a solvent, stirring the solution will increased the rate at which the substance dissolved. This is because, when one stirs a solution, it exposes more surface area of the solute to the solvent, thus, increasing the interaction between the solute and the solvent. The higher the quantity of the solute that is exposed to the solvent, the higher the rate of dissolution of the solute.

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For each pair circle the neutral element with the largest atomic radius K or Cs ,Ti or As ,Br or F
Bas_tet [7]

Answer:

Cs

Br

Ti

Explanation:

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.  In this way atomic radii of Cs is larger than K and size of Br is larger than F.

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases

Thus size of As is smaller than Ti.

6 0
2 years ago
Calculate the ph of a buffer that is 0.145 m hc2h3o2 and 0.202 m kc2h3o2. The ka for hc2h3o2 is 1.8 × 10-5.
koban [17]

Answer:

pH = 4.8

Explanation:

A buffer is formed by a weak acid (0.145 M HC₂H₃O₂) and its conjugate base (0.202 M C₂H₃O₂⁻ coming from 0.202 M KC₂H₃O₂). The pH of a buffer system can be calculated using Henderson-Hasselbalch's equation.

pH = pKa + log\frac{[base]}{[acid]} \\pH = -log(1.8 \times 10^{-5} )+log(\frac{0.202M}{0.145M} )\\pH=4.8

6 0
3 years ago
The amount of water vapor in the air, compared to the maximum amount that can be held at a specific air temperature is called:
Lisa [10]

Answer: D relative humidity

Explanation: Just took the test.

3 0
3 years ago
URGENT!!!!!!
Marrrta [24]

Answer:

(a) 0.0301g

Explanation:

4 0
3 years ago
What happens when you add acetic acid vinegar and sodium bicarbonate baking soda nahco​
Sophie [7]

Explanation:

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8 0
3 years ago
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