Use the “Dilution” step (from the 8.4 daily videos) first, whenever combining two solutions. Second, use these diluted concentrations to perform the first neutralization, involving the strong acid or base.
Then, use the results of this neutralization to decide what to do:
If there is leftover strong acid or base, use that remaining concentration to determine pH (pHun zone).
If there is no leftover strong acid or base, use the remaining concentrations of weak acid/base conjugates in the “Initial” line of your ICE tables (Ka or Kb of weak acid or base).

Strong Acid - Strong Base: You have 50. mL of a 0.15 M nitric acid solution (HNO3).
Determine the pH of this solution.
To it, you add a 0.30 M sodium hydroxide solution (NaOH). Determine the pH after…
15 mL are added
25 mL are added
40. mL are added
At any point during these additions, is the mixture a buffer solution? Why or why not?

Weak Acid - Strong Base: You have 50. mL of a 0.15 M nitrous acid solution (HNO2, Ka = 4.0x10-4).
Determine the pH of this solution.
To it, you add a 0.30 M sodium hydroxide solution (NaOH). Determine the pH after…
15 mL are added
25 mL are added
40. mL are added
At any point during these additions, is the mixture a buffer solution? If yes, when? Why?

Weak Base - Strong Acid: You have 30. mL of a 0.20 M aniline (C6H5NH2, Kb = 3.8x10-10).
Determine the pH of this solution.
To it, you add a 0.30 M hydrochloric acid solution (HCl). Determine the pH after…
10. mL are added
20. mL are added
30. mL are added
At any point during these additions, is the mixture a buffer solution? If yes, when? Why?

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

First to answer all gets a donation question 3(multiple choice worth 1 points) (04.01 lc) which of the following levels is lower than cells in the hierarchy of organization of living things? molecules organs organ systems tissues question 4(multiple choice worth 1 points) (04.01 lc) which of these represents an individual form of life such as an animal, plant, or single-celled life form? organ organism organ system tissue question 5(multiple choice worth 1 points) (04.03 lc) what are the green structures inside plant cells where photosynthesis takes place called? chloroplast mitochondrion nucleus vacuole question 6(multiple choice worth 1 points) (04.03 lc) which of the following best matches a part of a living cell with the function it performs? cytoplasm: fluid which carries the nucleus and other organelles vacuole: fluid which carries the nucleus and other organelles cytoplasm: directs all of the cell's activities vacuole: directs all of the cell's activities question 7(multiple choice worth 1 points) (04.03 mc) read the table below. organelles of plant cells present in both plants and animals present in plants but not animals small in animals but large in plants organelle a organelle b organelle c which statement is most likely correct? organelle a is chloroplast, organelle b is cytoplasm, and organelle c is nucleus. organelle a is mitochondrion, organelle b is cytoplasm, and organelle c is nucleus. organelle a is cell wall, organelle b is chloroplast, and organelle c is mitochondrion. organelle a is mitochondrion, organelle b is chloroplast, and organelle c is vacuole. question 8(multiple choice worth 1 points) (04.03 mc) what will most likely happen in the absence of a nucleus? genetic information will not be transmitted by the cell. energy will not be released during cellular respiration. the cell will not store food, water, nutrients, and waste. the cell will lose its shape and structure.