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Chapter 18: Q159CP (page 828)

Human urine has a normal pH of 6.2. If a person eliminates an average of 1250mL of urine per day, how manyH+ions are eliminated per week?

Short Answer

Expert verified

3.3脳1018H+ions are eliminated

Step by step solution

01

To find how many H +  ions are eliminated

First solve for theH3O+ from the given pH

role="math" localid="1663313092236" pH =- logH3O+H3O+=10- pH= 10- 6.2=6.31脳10-7M

Solve for the number of ions by converting it to moles and using Avogadro's number.

no. ofH+ions =6.32脳10-7M脳1.250L脳6.022脳1023H+ions1molHno. ofH+ions =4.75脳1017H+ions

4.75脳1017H+ions are eliminated per day. Multiply that by 7 days a week 3.3脳1018H+.ions are eliminated from an average person's body per week.

Hence, 3.3脳1018H+are eliminated.

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Most popular questions from this chapter

In his acid-base studies, Arrhenius discovered an important fact involving reactions like the following:

KOH(aq) + HNO3(aq)n?NaOH(aq) + HCl(aq)n?

(a) Complete the reactions and use the data for the individual ions in Appendix B to calculate each鈭�Hr脳n*

(b) Explain your results and use them to predict 鈭�Hr脳n*forKOH(aq) + HCl(aq)鈫�?

Why are most anions basic in H2O ? Give formulas of four anions that are not basic.

Question: Write the Ka expression for each of the following in water:

(a)H2PO4-

(b)H3PO2

(c)HSO4-

Write theexpression for each of the following in water:

(a)CH3NH3+

(b)role="math" localid="1657022192179" HClO

(c)role="math" localid="1657022265078" H2S

Use Appendix to calculate[H2S],[HS-],[S2-],[H3O+],pH,[OH-] andpOH in a 0.10Msolution of the diprotic acid hydro sulfuric acid.
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