# LE19 pH and pOH_ Sp17 - CH302 Sutcliffe (50385) -...

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2/27/2017LE19 pH and pOH: Sp17 ­ CH302 Sutcliffe (50385)1/10LE19 pH and pOHDueFeb 23 at 9:30amPoints10Questions10Availableuntil Feb 23 at 9:30amTime LimitNoneAllowed Attempts3Instrucड़onsThis quiz was locked Feb 23 at 9:30am.Aאempt HistoryAttemptTimeScoreKEPTAttempt 22 minutes10 out of 10LATESTAttempt 22 minutes10 out of 10Attempt 11,003 minutes8 out of 10Score for this attempt:10out of 10Submitted Feb 23 at 1:57amThis attempt took 2 minutes.Learning Exercise 19: pH and pOHThis is a short, formative learning exercise about pH and pOH of solutions.1 / 1 ptsQuestion 1Just a reminder about logarithms ­­> Logarithms are a useful mathematical tool that are extremely helpfulwhen dealing with extremely large or extremely small numbers. There are a number of usefulrelationships to remember:log(xy) = log(x) + log(y)log(x/y) = log(x) ­ log(y)log(x/y) = ­log(y/x)log(x ) = ylog(x)Match the collapsed logarithm with the expanded version.ylog(45)log(9)+log(5)Correct!log(3)log(15)‐log(5)Correct!log(9/2)Correct!Loading [Contrib]/a11y/accessibility­menu.js
1 / 1 ptsQuestion 2Use the following information to answer the next few questions on the learning exercise:pH and pOHThe pH ScaleThe pH scale is a scale that expresses the hydronium ion concentration,[H O ], in an aqueous solution using log base 10.When you are dealing with very large or very small numbers it is convenient touse logarithms. Note: We will be using the logarithm base 10, log, which isdenoted as "log" (this is not the log "base 2", log ; or the log base "e", log , thatis the natural logarithm noted as ln).Pure neutral water at room temperature has a hydronium ionconcentration, [H O ] = 1.0×10M.