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Anna35 [415]
3 years ago
5

50 POINTS!!! Based on your observations in the virtual lab, fill in the data table below.

Chemistry
1 answer:
stiks02 [169]3 years ago
4 0

Hi Khal75,

Experiment: How to seperate iron fillings

Iron fillings is a substance that attracts to magnets.

Answer - Separated using a magnet; magnetism

If you move a magnet around different solids with the iron fillings in it, it wil attract the iron to be able to seperate it.

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In a solution, when the concentrations of a weak acid and its conjugate base are equal, ________.
NARA [144]

In a solution, when the concentrations of a weak acid and its conjugate base are equal, the -log of the concentration of H+ and the -log of the Ka are equal.

<h3>What is Henderson-Hasselbalch equation ?</h3>
  • This formula is frequently used to determine the pH of buffer solutions. A weak acid and its conjugate base make up buffer solutions.
  • To find the pH of the buffer solution, we obtain the pKa of the weak acid and add it to the log of the concentration of the conjugate base divided by the concentration of weak acid.
  • So whenever the concentration of the weak acid is equal to the concentration of the conjugate base, the pH of the buffer solution is equal to the pKa of the weak acid.
<h3 />

To know more about buffer solutions you can refer to the link below:

brainly.com/question/10695579

#SPJ4

6 0
2 years ago
Read 2 more answers
If the number of equally likely sample outcomes of a single ASAP! stage of an experiment is 4, what is the total number of eleme
Harrizon [31]

Answer:

C. 64

Explanation:

Given:

The number of equally likely sample outcomes of a single stage = 4

Unknown:

Total number of elements if there are three stages= ?

Solution;

Probability is the likelihood of an event to occur.

  In this problem;

      For a single stage, the likely outcome is 4

So therefore;

   For the 3 stages 4 x 4 x 4 = 64

Therefore, the total number of elements in the sample space of an experiment with 3 stages is 64

3 0
4 years ago
Steve is performing a titration, where a base is at an unknown concentration. What should he choose as his indicator solution?St
lidiya [134]

Answer:

D

Explanation:

4 0
3 years ago
Refer to the illustration of the periodic table to determine which formula is correct.
Mekhanik [1.2K]

Answer:

D. MgO

Explanation:

We need to look at the charge of element. (Look at a periodic table for this)

Mg, which is Magnesium, has a charge of 2+ because it's in the second column, or group, from the left.

O, which is Oxygen, has a charge of 2- because it's in the second column, or group, from the right.

Since Mg is 2+, it's the cation and since O is 2-, it's the anion. We can put these two elements together into an ionic compound.

Mg^(2+) and O^(2-) becomes Mg2O2, where we can cancel the 2s: MgO.

Thus, the answer is D.

Hope this helps!

5 0
3 years ago
A 6.50x10^-5 m solution of potassium permanganate has a percent transmittance of 27.3% when measured in a 1.15 cm cell at a wave
mihalych1998 [28]
For this problem, we use the Beer Lambert's Law. Its usual equation is:

A = ∈LC
where
A is the absorbance
∈ is the molar absorptivity
L is the path length
C is the concentration of the sample solution

As you notice, we only have to find the absorbance. But since we are not given with the molar absorptivity, we will have to use the modified equation that relates % transmittance to absorbance:

A = 2 - log(%T)
A = 2 - log(27.3)
A = 0.5638
7 0
3 years ago
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