Practice Questions
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Which device is commonly used to measure the pH level of liquids in a business setting?
A pH meter uses a special electrode that reacts to the amount of hydrogen ions in a liquid. Other options are incorrect because A thermometer measures...
Which method would be most effective for testing the pH of a common household liquid that is suspected to be acidic, such as vinegar?
pH test strips change color when they touch a liquid, showing whether the liquid is acidic or basic. Other options are incorrect because Some think th...
Why is it important for businesses in the food industry to test the pH of common liquids using litmus paper?
Litmus paper shows whether a liquid is acidic or alkaline, which tells if the food is safe to eat. Other options are incorrect because Some think litm...
How can the pH levels of common liquids affect health implications in the food and beverage industry, particularly in quality control processes?
Keeping the pH in the right range stops harmful bacteria from growing. Other options are incorrect because Some people think pH testing is useless for...
Which of the following common liquids would likely have the highest pH level when tested, indicating it is more basic?
Baking soda is a base, meaning it can release hydroxide ions when dissolved in water. Other options are incorrect because The purified water is neutra...
Arrange the following steps in the correct order for testing the pH of a liquid using universal indicator paper: A) Dip the indicator paper into the liquid, B) Compare the color change of the paper to the pH scale, C) Record the pH value, D) Prepare the liquid sample if needed.
First you must prepare the liquid if it needs cleaning or dilution. Other options are incorrect because This order puts the recording step before the ...
Which of the following liquids would you classify as acidic based on its pH level when tested with universal indicator paper?
The juice from a grapefruit has a low pH around 3, meaning it contains many hydrogen ions. Other options are incorrect because Many think baking soda ...
Which of the following liquids are likely to have a pH less than 7, indicating they are acidic? Select all that apply.
The citrus fruit juice is very acidic, with a pH around 3. Other options are incorrect because Pure water has a neutral pH of 7, so it is not acidic; ...
Grapefruit juice: acidic :: Baking soda: ?
Baking soda is a salt that reacts with water to give a solution that has a higher pH than neutral. Other options are incorrect because Some think baki...
When measuring the acidity of a liquid using universal indicator paper, a lower pH value corresponds to a higher concentration of __________ ions.
A lower pH means the solution is more acidic. Other options are incorrect because Hydroxide ions make a solution basic, not acidic; Carbonate ions are...
Which of the following liquids is most likely to have a pH below 7 when tested with universal indicator paper?
Lemon juice is an acid. Other options are incorrect because Many think baking soda is acidic because it tastes salty; Some believe water is acidic bec...
If you test grapefruit juice and find it has a pH of around 3, what does this indicate about its acidity compared to water?
A pH of 3 means the juice has many more hydrogen ions than water. Other options are incorrect because The idea that pH 3 equals neutral is wrong; Thin...
You are in a laboratory conducting a pH test on various liquids, including lemon juice, baking soda solution, and soda. After testing, you observe that lemon juice turns the universal indicator paper red, the baking soda solution turns it blue, and soda shows a yellowish color. Based on this information, which statement accurately describes the pH levels of these liquids?
The red color shows lemon juice is acidic, the blue color shows baking soda is alkaline, and the yellowish color shows soda is acidic. Other options a...
If a liquid has a pH of 3, what can we infer about its hydrogen ion concentration compared to a liquid with a pH of 6?
The pH scale is logarithmic. Other options are incorrect because The idea that a 3‑unit difference equals 3 times more ions is a linear mistake; Think...
Master pH Testing of Common Liquids
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