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A universal indicator, available as a paper strip or solution, is used in a lab to visually estimate the pH of a solution by matching its resulting color to a provided chart. It's made by mixing several different pH-sensitive dyes, such as thymol blue, methyl red, bromothymol blue, and phenolphthalein solution, which collectively provide a wide range of color changes from red (acidic) to violet (alkaline) across a pH scale of about 4-14.

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I would choose the pH paper as it is more accurate and reliable. Upon contact with acid, it will turn red, and upon contact with alkaline, it will turn blue. While pH paper changes for both, the phenolphthalein solution doesn’t change colour upon contact with acid or neutral, making it less reliable.

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yes it is harmful due to the low ph level in water which is not good.

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yes it is harmful cause of the low pH level

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Acoording to me Dubai water is not polluted because the pH level is high ,it is safe to drink

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Acoording to me Dubai water is not polluted because the pH level is high ,it is safe to drink

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No bottled water in Dubai is not harmful

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It is harmful

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It is not good since the level is a little acidic and scientists are correct

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I would chose the pH paper as it would regulate the pH level better and give a more accurate response to the pH levle of the bottled water in dubai.

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‘it is harmful

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I would use pH paper to measure because phenolphthalein solution won't change color upon contact with the solution, making it less reliable and less accurate.

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If i were a scientist and were given the responsibility to check the safety level of the water i would use pH paper because when measures with the phenolphthalein the solution wont change color upon contact with the solution making it non reliable and not accurate.

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If I were a scientist I would use the pH paper rather than phenolphthalein, the reason is because phenolphthalein does not change color upon acids , and I feel pH paper will give the more accurate results.

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If I was a scientist measuring the level of pH in bottled water, we should use pH paper instead of phenophthalein because it is a synthetic material which might be poisonous to humans and hard to source in labs. It is also not the most reliable form of measuring the acidity or alkalinity as there is no way to know whether a solution is neutral or acidic becaue phenophthalein remains colourless in both solutions.

However, pH paper is more reliable and also less poisonous and easier to test vide batches of water.

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pH level in bottle water is good so bottle water is not harmful, I will use litmus papers to check the PH

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Ph paper is way more reliable to measure the acidity or alkalinity of the water as it will change color to blue or red and indicate if it is acid or basic . Phenothpheln is less reliable as it doesn’t change the color on acidic and neutral substances .

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I would use pH paper, as it is the safest option amongst both of them. Also because phenolphthalein solution may be a bit confusing to decipher. Although, if you dip both red and blue litmus paper at the same time, the results will be clearer and more accurate.

-Jovita Kalyani

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It is very harmful because of low ph level

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I would use a pH indicator such as china rose because upon being in contact with a acidic base it turns reddish pink and

And upon acid it turns geeenish and in neutral it turns colourless so it is easy to identify and identify if it’s useful or not.

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I would use a pH paper as the color changes as per the pH level

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If I were a scientist, I would use pH paper rather than phenolphthalein because phenolphthalein does not change color upon acid. Also, pH paper will give more accurate results

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Its is not harmful as it has high ph levels

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I would use a pH indicator such as pH paper in order to indicate if the pH level is acidic or bases. If it is any one of then, the colour will change. However, if it stays the same colour then, it is neutral!!

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A universal indicator is a pH indicator made of a solution of several compounds that exhibit various smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions.

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a universal indicator could be pH paper. It is made out of paper strips treated with pH-sensitive dyes,a mixture of chemical indicators that produces a range of colors to approximate the pH of a solution, indicating its acidity, alkalinity, or neutrality

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A universal indicator is a mixture of pH-sensitive dyes that displays a smooth range of colors to show the pH (acidity or alkalinity) of a solution. It provides approximate value of the substance l

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A universal indicator is a mixture of dyes that shows different colors to indicate the pH of a solution. It turns red in strong acids, green in neutral solutions, and purple in strong bases, helping us identify acidity or alkalinity.

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In order to check if the water bottle is safe to drink in Dubai,

So I will check the pH level using litmus paper to see whether it is safe or unsafe to drink water bottle in Dubai.

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A universal indicator is a dye mix that shows different colors at different pH.

It’s used to test acidity or alkalinity.

It’s made by combining several indicators such as phenolphthalein and more.

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A universal indicator is a mixture of multiple pH indicators that displays a wide range of colors across the entire pH scale, allowing you to determine the approximate acidity or alkalinity of a solution.

Solution: The main components of a universal indicator, in the form of a solution, are thymol blue, methyl red, bromothymol blue, and phenolphthalein.

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the unviversal indicator is litmus paper

As it contains dye mix that shows different colours

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A universal indicator shows a range of colors to show the level of pH level

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Universal indicator contains materials such as Methyl red and bromothyl

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A universal indicator is a micture of several weak chemical indicators.

It usually contains materials such as

Phenolphthalein

Methyl red

Bromothymol blue

Thymol blue

Available as a solution or on paper, observed color to a provided color chart, with colors shifting from red (acidic) through green (neutral) to blue or violet (alkaline).

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The universal indicator is litmus paper as, it is safe and the best type of indicator to use as u just need to dip it into the substance.

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The universal indicator is litmus paper.

Litmus paper contains a mixture of several acid-base indicators, such as methyl red, thymol blue, phenolphthalein solution, and bromothymol blue, dissolved in a water and alcohol solvent.

This means it contains both acids and bases, making it a fine universal indicator

-Jovita Kalyani 7F

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Universal indictors contain phenolphthalein and thymol blue

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Yes it is safe to drink

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A universal indicator is a mixture of chemicals that shows the approximate pH level of a solution through a range of colorsThe main components of a universal indicator, in the form of a solution, are thymol blue, methyl red, bromothymol blue, and phenolphthalein