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This is kind of a tricky question. But if you're wanting to skip to the end, the answer is spectrophotometry. Remember that, when we speak of the intensity of a color, we are talking about the intensity of some beam of light. This intensity is just a measure of the energy deposited by this beam of light on a given area in a given time (normally measured in watts per meter squared). The problem is, when we speak of the "intensity" of the color of a solution, we use "intensity" in its colloquial sense. This "intensity" actually arises from the solution ABSORBING light. Solutions will absorb particular wavelengths of light much more than they will other wavelengths of light. Let's introduce some terms, the definition of which will become clear from the upcoming context.

We have some color: A

and its complementary color: B

Let's say that a solution appears to be A-colored. This is because light passes through the solution, and the solution very effectively absorbs B-colored light. The extent to which the solution absorbs this B-colored light (or the absorbance) depends on the concentration of the solution, and the amount of the solution through which the light travels (path length).

these relationships are governed by the Beer-Lambert Law, which is as follows.

A=ebc

with variables:

A=absorbance (unitless)

b=path length (units of length)

c = concentration

and e=extinction coefficient. (normally units of 1/length * concentration)

The extinction coefficient is experimentally determined for a given solution at a given wavelength.

Spectrophotomers are machines that find the wavelength of peak absorbance and measure that absorbance. They don't come cheap, but you can probably see why this is such an extremely powerful tool.

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Example of industry that use standard solutions and titrations?

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To determine the pH when mixing two solutions, you can use a pH meter or pH strips to measure the acidity or alkalinity of the resulting solution. pH is a measure of the concentration of hydrogen ions in a solution, with lower pH values indicating acidity and higher pH values indicating alkalinity. By measuring the pH of the mixed solutions, you can determine the overall pH of the resulting mixture.


What tool in chemistry should you use to measure acid?

You should use a pH meter or pH paper to measure the acidity of a solution. These tools provide a way to quantitatively determine the concentration of hydrogen ions in the solution, which correlates with its acidity.


What was your strategy for testing whether a solution of strong acid and solution of weak acid can have the same pH?

I would first prepare solutions of both strong and weak acids at the same concentration. Then, I would measure the pH of each solution using a pH meter. If the pH values of the two solutions are the same, it would indicate that they have the same concentration of H+ ions despite their different strengths.


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pH (potential of hydrogen) is the term that best describes the measure of the acidity of a solution. It is a scale ranging from 0 to 14, with lower values indicating more acidic solutions, higher values indicating more basic solutions, and a pH of 7 being neutral.

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