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Questions and Answers
What are the two forms in which acids can be available?
Which of the following bases is commonly found in lime water?
Why is it not advisable to taste unknown substances?
What color change would you expect when lemon juice is applied to blue litmus paper?
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What is a potential source of ammonium hydroxide as mentioned in the content?
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What do the substances that do not change the color of either red or blue litmus indicate?
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Which natural indicator is mentioned as being used for testing with litmus?
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How can lime water be prepared according to the activity?
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What is one of the purposes of making turmeric paper as described in the activity?
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What observation is expected when soap solution is applied to turmeric paper?
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What is the taste of acids?
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Which statement is true regarding bases?
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What type of solution is distilled water?
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What do you call substances that show different colors in acidic and basic solutions?
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What is formed when an acid and a base neutralize each other?
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What color does the China rose indicator turn in basic solutions?
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What happens to the indicators when they are added to acidic solutions?
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Why might solid baking soda give different results on dry litmus paper compared to a solution of the same?
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What is acid rain?
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Where do the acids that contribute to acid rain typically originate?
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What solution should Dorji serve if a customer requests a neutral drink?
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Which statement correctly explains the effect of an acid on blue litmus paper?
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Which indicator is appropriate for determining whether a substance is acidic or basic?
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Why is an antacid tablet taken when suffering from acidity?
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What should happen when turmeric indicator is added to a sodium hydroxide solution?
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Study Notes
Acids, Bases and Salts
- Acids are sour tasting substances that turn blue litmus paper red.
- Bases are typically bitter and soapy, and they turn red litmus paper blue.
- Neutral solutions are neither acidic nor basic. These solutions do not change the color of litmus paper.
- Indicators are substances that change color in the presence of acids or bases. Examples include litmus paper (red and blue), turmeric, and China rose solution.
- Turmeric paper turns reddish-brown in the presence of bases and remains yellow in the presence of acids.
- China rose solution changes to dark pink (magenta) in acidic solutions, green in basic solutions, and remains reddish-orange when neutral.
- Neutralization is the reaction between an acid and a base, which produces a salt and water. Salts can be acidic, basic, or neutral.
- Acid rain is rain with a high concentration of acids. It forms when sulfur dioxide and nitrogen oxides in the atmosphere react with water to form sulfuric and nitric acids.
- The process of neutralization is demonstrated when antacid tablets are used to neutralize stomach acid.
- Calamine solution is used to neutralize the formic acid injected by ant stings.
- Factory wastes are neutralized before being disposed of into water bodies to minimize harmful effects.
- Distilled water is neutral and does not change the color of either red or blue litmus paper.
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Description
Test your knowledge on acids, bases, and salts with this quiz. Explore concepts such as indicators, neutralization reactions, and the properties of different solutions. Perfect for students learning about chemistry in class!
