Which of the following are properties of basic solutions?
a.They turn the dye litmus red.
b.They taste sour.
c.They feel slippery.
d.They react with active metals to produce hydrogen gas.
Both c and d are correct BUT if you are using a keyed on-line database, d may be counted wrong because most remember that as an acid reaction. Turns out that both acids and bases will produce hydrogen gas from active metals.
To determine which of the options are properties of basic solutions, we need to understand what a basic solution is.
A basic solution, also known as an alkaline solution, is a solution that has a pH value greater than 7. It contains an excess of hydroxide ions (OH-) compared to hydrogen ions (H+).
Let's go through each option and see if it is a property of basic solutions:
a. They turn the dye litmus red: This statement is incorrect. Basic solutions actually turn the dye litmus blue, not red. Therefore, this option is not a property of basic solutions.
b. They taste sour: This statement is incorrect. Sour taste is generally associated with acidic solutions and not basic solutions. Therefore, this option is not a property of basic solutions.
c. They feel slippery: This statement is correct. Basic solutions, due to the presence of hydroxide ions, feel slippery or soapy when touched. Therefore, this option is a property of basic solutions.
d. They react with active metals to produce hydrogen gas: This statement is incorrect. This property is actually associated with acidic solutions, not basic solutions. In acidic solutions, active metals such as zinc or magnesium react with the hydrogen ions to produce hydrogen gas. Therefore, this option is not a property of basic solutions.
So, from the given options, the only property of basic solutions is that they feel slippery.