Acetic acid has a Ka of 1.8×10^−5. Three acetic acid/acetate buffer solutions, A, B, and C, were made using varying concentrations:

a. [acetic acid] ten times greater than [acetate],
b. [acetate] ten times greater than [acetic acid], and
c. [acetate]=[acetic acid].

Match each buffer to the expected pH.

pH = 3.74 ; pH = 4.74 ; pH = 5.74

How many grams of dry NH4Cl need to be added to 2.30 L of a 0.600 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.71? Kb for ammonia is 1.8×10^−5. Express your answer with the appropriate units.

1. according to the article, the chinese government has tried to control its people in all of the following ways except: question 1 options: create and spread propaganda in the media censorship of the media allowing people to create their own social media deleting people's social media posts without their permission question 2 (1 point) 2. when a government has total control over its citizens, including the media, it is a of government question 2 options: constitutional monarchy parliamentary democracy autocracy presidential democracy question 3 (1 point) according to the article, "social credit" is question 3 options: an experiment to people talk on-line a farming experiment that hurt people under mao ze dong using someone else's data from the internet, to give or take away things such as the right to buy an airline ticket a credit you get in china for having friends in real life, and not just on social media question 4 (1 point) china wants to take control over social media in which other region? question 4 options: taiwan chile japan hong kong

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

How to calculate the mass of copper