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Amiraneli [1.4K]
3 years ago
10

Which of the following material(s) and equipment are necessary to acquire the above graph? Mark all that apply. Make sure to hav

e your answer in alphabetical order.
A. An acid.

B. A Base.

C. An indicator.

D. A pH meter.

E. A Burette.

Chemistry
1 answer:
Amanda [17]3 years ago
3 0

Answer:

  A, B, D, E

Explanation:

This titration involved adding measured amounts of an acid (HCl) to a base, and recording quantitative measurements of the resulting pH. The necessary equipment includes ...

  • an acid (specifically, HCl)
  • a base
  • a pH meter for quantitative measurements of pH
  • a device for precisely measuring the acid (a burette works for this)

We believe these requirements are consistent with choices A, B, D, E from the list given.

__

An "indicator" will typically change some obvious property (often, color) at a specific value of pH. It generally is not quantitative enough for the purpose of drawing the supplied graph. A pH meter is a better choice.

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3. What is the name for the items in this group as a whole: protons,
Sidana [21]

Answer: C) Subatomic particles

Explanation: I just learned this in ap environmental science

7 0
3 years ago
What is the density of a substance that has a mass of 453g and a volume of 224mL?
Savatey [412]
453 divided by 224
density is roughly 2.02 g per ml
as a ml is 1 cm3 density is 2.02 grams per centimeter cubed
7 0
3 years ago
To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance.
kap26 [50]

To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance. You need to pipet 0 mL of the diluted solution to have 0.00 mg of iron.

In spectrophotometry, to plot the calibration curve, you need to prepare solutions with known concentrations and measure their absorbance.

We have a standard iron solution with a concentration of 0.2500g/L of pure iron (C₁). We pipet 25.00mL (V₁) of this standard iron solution into a 500mL (V₂) volumetric flask and dilute up to the mark with distilled water.

We can calculate the concentration of the diluted solution (C₂) using the dilution rule.

C_1 \times V_1 = C_2 \times V_2\\\\C_2 = \frac{C_1 \times V_1}{V_2}  = \frac{0.2500 g/L \times 25.00 mL}{500 mL} = 0.0125 g/L

Then, if we wanted to prepare the blank, that is, the solution that contains the same matrix but not the analyte, and whose concentration in iron is 0.00 mg/L, we wouldn't pipet any of the diluted solution.

To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance. You need to pipet 0 mL of the diluted solution to have 0.00 mg of iron.

Learn  more: brainly.com/question/24195565

8 0
2 years ago
What is the molarity of a solution with 23 moles of solute, and 100 ml of a solvent?
Marina CMI [18]
Molarity is calculated by using following formula,

                            Molarity  =  Moles / Volume

Data Given:
                  Moles  =  23 moles

                  Volume  =  100 ml ÷ 1000  =  0.1 L

Putting values in eq. 1,

                              Molarity  =  23 mol / 0.1 L

                              Molarity  =  230 mol/dm³

Result:
           When 23 mol of solute is dissolved in a solvent to make a solution of 100 ml, then it will have a Molarity of 230 mol/dm³.
3 0
3 years ago
Examining the figure, how many orders of magnitude larger is a person than a bacterial cell?
Allushta [10]
Well you did not show the figure, but I can show you how to do it.

Suppose the person is 6 feet tall and the bacteria cell is 1 micrometer in length.

So, put both magnitudes in the same units. I will use meter.

Person: 6 feet * 0.3048 m / foot = 1.8288 m, which in orders of magnitud is about 2 m

Bacteria cell: 1 micrometer * 1 m / 1,000,000 micrometer = 1 * 10 ^ -6 m.

Now divide: 2m / 10^ -6 m = 2,000,000

So a person is about 2 million times larger than a bacteria cell.

If the numbers in your figure are different you can use the same method to get a new result according to your figure.
8 0
3 years ago
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