Part A Complete the first row. Express your answer using two significant figures

Question

Part A

Complete the first row.

Express your answer using two significant figures.

Part B

Complete the first row.

Express your answer using two decimal places.

Part C

Complete the first row.

Express your answer using two decimal places.

Part D

Complete the first row. Indicate whether the solution is acidic or basic.

Part E

Complete the second row.

Express your answer using two significant figures.

Part F

Complete the second row.

Express your answer using two decimal places.

Part G

Complete the second row.

Express your answer using two decimal places.

Part H

Complete the second row. Indicate whether the solution is acidic or basic.

SubmitMy AnswersGive Up

Part I

Complete the third row.

Express your answer using two significant figures.

Part J

Complete the third row.

Express your answer using two significant figures.

Part K

Complete the third row.

Express your answer using two decimal places.

Part L

Complete the third row. Indicate whether the solution is acidic or basic.

Complete the third row. Indicate whether the solution is acidic or basic.

Part M

Complete the fourth row.

Express your answer using two significant figures.

Part N

Complete the fourth row.

Express your answer using two significant figures.

Part O

Complete the fourth row.

Express your answer using two decimal places.

Part P

Complete the fourth row. Indicate whether the solution is acidic or basic.

Explanation / Answer

Recall that

pOH + pH = 14

Kw = 10^-14

Kw = [H+][OH-]

knowing this:

First row:

[H+] = 7.4*10^-3

pH =-log(H) = -log(7.4*10^-3) = 2.13

this is acidic, pH <7

pOH = 14-2.13 = 11.87

[OH] = 10^-pOH = 10^-11.87 =1.348*10^-12 M

Q2.

2nd row:

[OH-] = 3.3*10^-10

pOH = -log( 3.3*10^-10 = 9.481

pH = 14-pOH = 14-9.481 = 4.519

this is acidic, since pH < 6

[H+] = 10^-pH = 10^-4.519 = 0.0000302 M

Q3.

third row

pH = 8.28

pOH = 14-8.28 = 5.72

this is basic, sice pH >7

[H+] = 10^-pH = 10^-8.28 = 5.2480*10^-9 M

[OH-] = 10^-pOH = 10^-5.72 = 1.9*10^-6 M

Q4.

final row

pOH = 5.73

pH = 14-5.73 = 8.27

this is basic since pH >7

[OH-] = 10^-pOH = 10^-5.73 = 1.86*10^-6

[H+] = 10^-pH = 10^-8.27 = 5.370*10^-9 M

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.