Skip to main content

Many household cleaning products and soaps are slippery. This is an indication that they are: a. acidic and would turn blue litmus paper red b....

The properties and characteristics of acids and bases are as follows:


Acids


  • Conduct electricity

  • Taste sour

  • React with and neutralize bases

  • React with active metals to produce hydrogen gas

  • pH is less than 7

Bases


  • Conduct electricity

  • Taste bitter

  • React with and neutralize acids

  • Feel slippery 

  • pH is greater than 7

Therefore, we would expect household cleaners and soaps to be bases.


Litmus Paper


Litmus is a colored organic dye. Litmus has a pH range of about 4.5 to 8.3. Litmus paper can be either blue or red.


  • When red litmus paper is placed in an acid, it will remain red.


  • When red litmus paper is placed in a base, it will turn blue.

  • When blue litmus paper is placed in an acid, it will turn red.

  • When blue litmus paper is placed in a base, it will remain blue.

Therefore, we would predict that cleaning products and soaps would turn red litmus paper blue.


The answer is b.

Comments

Popular posts from this blog

Is there a word/phrase for "unperformant"?

As a software engineer, I need to sometimes describe a piece of code as something that lacks performance or was not written with performance in mind. Example: This kind of coding style leads to unmaintainable and unperformant code. Based on my Google searches, this isn't a real word. What is the correct way to describe this? EDIT My usage of "performance" here is in regard to speed and efficiency. For example, the better the performance of code the faster the application runs. My question and example target the negative definition, which is in reference to preventing inefficient coding practices. Answer This kind of coding style leads to unmaintainable and unperformant code. In my opinion, reads more easily as: This coding style leads to unmaintainable and poorly performing code. The key to well-written documentation and reports lies in ease of understanding. Adding poorly understood words such as performant decreases that ease. In addressing the use of such a poorly ...

Is 'efficate' a word in English?

I routinely hear the word "efficate" being used. For example, "The most powerful way to efficate a change in the system is to participate." I do not find entries for this word in common English dictionaries, but I do not have an unabridged dictionary. I have checked the OED (I'm not sure if it is considered unabridged), and it has no entry for "efficate". It does have an entry for "efficiate", which is used in the same way. Wordnik has an entry for "efficate" with over 1800 hits, thus providing some evidence for the frequency of use. I personally like the word and find the meaning very clear and obvious when others use it. If it's not currently an "officially documented" word, perhaps its continued use will result in it being better documented.