chemistry help

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I have too questions that I am having a problem with and I am wondering if someone could help me.

What ion is in excess in acidic acid solutions?

  1. Cl-


  2. H3O+


  3. OH-


  4. Hydroxide


  5. hydrogen gas


A buffer functions to

  1. maintain a pH of 7.0


  2. maintain a neutral pH


  3. maintain a fairly constant pH


  4. decrease chances for survival


  5. dilutes bases


The answers that I chose was b for the first question and c for the second one.

Oh, one more thing I am having a problem writing a pH for a solution with a hydrogen ion concentrating of 3.7 x 10-5

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You are correct, b and c.

Why don't you guess the pH and I will tell you if you are correct?

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Specializes in Emergency Nursing.

Your first 2 answers are correct.

pH is equal to the negative log of the hydrogen ion concentration of a solution. I'm not going to do the math for you though.;)

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I came up with 4.43 log(3.7*10-5)=4.43

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Good job. That's what I would put too.

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Specializes in Med-Surg/Peds/O.R./Legal/cardiology.

I agree. :yeah:

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How about these questions are these right?

What is the correct conjugate base for H3PO4?

  1. PO4-3
  2. H2PO4-
  3. Phosphate
  4. HPO4-2
  5. Cl-

I chose number 2

what formula defines pH?

  1. log(H+)
  2. log(OH-)
  3. -log(H+)
  4. -log(OH-)
  5. none of the above

I chose 3

What ion is produced in basic or alkaline solutions?

  1. hydroxide
  2. OH-
  3. Hydrogen
  4. both a&b are correct
  5. none of the above

I chose 4

If a solution has a pH of 3.5, which statement is true?

  1. the solution is acidic
  2. the solution is basic
  3. the solution has excess hydroxide ions
  4. both b&c are correct
  5. you could never drink a solution with a pH of 3.5

I chose 1

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Looks like you don't really need our help! I would agree with all your answers.

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Specializes in Gerontology, nursing education.

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