C. Turns it red D. Turns it black 答案:C。解析:文中提到 Acids have several properties. 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 ...
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 properties of bases? Bases have a bitter taste (opposed to sour taste of acids) Bases fee; slimy, or soapy feel on fingers Bases turn red litmus paper blue If mixed with an acid, bases will reduce the pH value. If touched, it may cause a skin irritation. ...
The colour of certain acid-base indicators ll is changed because of the presence of acid. Litmus and phenolphthalein are the two main indicators that are unknown. Blue litmus turns red due to the presence of acid. But unlike litmus paper, phenolphthalein turns colourless. Chemical Properties of ...
acids turn litmus red bases turn litmus blue metals that don't dissolve in (most) acids Cu, Au, Ag, Pt, Hg Kw dissociation for water Ka dissociation constant for a weak acid 最好的學習方式。免費註冊。 註冊代表你接受Quizlet的服務條款和隱私政策 以Google帳戶繼續 關於...
What are Bronsted-Lowry acids-bases, and Conjugate acids-bases? Is NH4+ is acid or base? Acids and Bases: Acids are substances that can turn blue litmus paper to red. They are sour and sticky when present in high concentrations. On the other hand, bases are su...
Bases turn red litmus blue and all bases are not soluble in water. Those bases which are soluble in water are called alkali. Question 6: What are the products formed when NaOH solution reacts with zinc metal? Answer: NaOH solution reacts with zinc metal to give sodium zincate and hydrogen...
In a water solution, how do acids differ from bases? a. Acids form salts but bases do not. b. Acids turn litmus blue, while bases turn litmus red. c. Acids form hydrogen ions (H+), while bases form hydroxide ions (OH-).
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...
One common test of whether an unknown is an acid or a base is to wet litmus paper with it.Litmus paperis a paper treated with an extract from a certain lichen that changes color according to pH. Acids turn litmus paper red, while bases turn litmus paper blue. A neutral chemical won't...