They turn blue litmus paper red.,即酸能使蓝色石蕊试纸变红。 <问题 3> What gas is produced when a metal reacts with an acid? A. Oxygen gas B. Carbon dioxide gas C. Hydrogen gas D. Nitrogen gas 答案:C。解析:It is stated that acids react with metals to produce hydrogen gas.,即酸...
Acids in water solutions exhibit the following common properties: they taste sour; turnlitmuspaper red; and react with certain metals, such as zinc, to yield hydrogen gas. Bases in water solutions exhibit these common properties: they taste bitter; turn litmus paper blue; and feel slippery. Whe...
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Acids alter the colour of litmus paper from red to blue when they react with metals and give H2 gas, and when they react with bases, they make salt and water. Acidic solutions have a pH less than 7, with lower pH values indicating more acidity. Bases A corrosive material is one that,...
In chemistry,basesare substances that, in aqueoussolution, are slippery to the touch, taste astringent, change the color of indicators (e.g., turn red litmuspaper blue), react with acids to form salts, promote certain chemical reactions (basecatalysis), accept protons from any proton donor, ...
A. They taste sour. B. They can turn blue litmus paper red. C. They react with metals to produce hydrogen gas. D. They feel slippery. 相关知识点: 试题来源: 解析 D。解析:酸尝起来是酸的,能使蓝色石蕊试纸变红,能和金属反应产生氢气,而感觉滑腻是碱的性质,不是酸的性质,所以D正确。反馈...
bases don’t change the colour of litmus; they can turn red (acidified) litmus back to blue feel slippery or soapy (don’t arbitrarily touch them!) react with acids to form salts and water their aqueous (water) solutions conduct an electric current (are electrolytes) ...
An acid is a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts More About Acids Aqueous solutions of acids have a pH of less than 7 A lowe...
What are the characteristics of Arrhenius acids? Arrhenius acids share many properties. They typically will be able to react with acids, have a sour taste, turn litmus paper red, and have a pH of less than 7.Arrhenius Acid and Base An Arrhenius acid can best be defined as a substance whi...
What are the properties of bases or alkaline? Taste bitter pH greater than 7 Turns red litmus paper to blue (RBB) Form OH- (hydroxide ions) in a solution Feels soapy or slippery React with fats to make soap Dissolves fats and oils Reacts with acids and neutralizes it ...