If (H30+)=1M, provide the hydroxide ion concentration [HO") by performing a calculation using equation 8.15. Please input your answer in the format 1E-7 (with no units). Type your answer and submit

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Chapter1: Chemical Foundations
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The ion product of water is important since it describes any water solution not just pure water. In other
words, if either the hydronium ion or hydroxide ion concentrations are known, the other can be calculated.
The value of pK,w (pKw =14) can be determined from the power of the Kw value in equation 8.15 and a sign
change.
Since concentrations are often small and are expressed using scientific notation, another scale, pH, is
commonly used to report acidity. Just like pka, pH is logarithmic, reported as the power of ten with a sign
change.
pH = - log [H30*]
8.16
Pure water has a pH equal to seven (from [H30*] = 10-7), and a complete range of pH values appear in Table
9.4. The concentration of acid increases as the value of pH decreases; the smaller the pH, the more acidic a
solution. Each pH unit represents a 10-fold change in concentration. Table 9.4 also shows the concentration
of hydroxide in each solution, calculated from the ion product of water (equation 8.15).
Question 8.16
Homework • Unanswered
If [H30+] = 1M, provide the hydroxide ion concentration [HO¯] by performing a calculation using equation 8.15. Please
input your answer in the format 1E-7 (with no units).
Type your answer and submit
Unanswered . 5 attempts left
Submit
Transcribed Image Text:The ion product of water is important since it describes any water solution not just pure water. In other words, if either the hydronium ion or hydroxide ion concentrations are known, the other can be calculated. The value of pK,w (pKw =14) can be determined from the power of the Kw value in equation 8.15 and a sign change. Since concentrations are often small and are expressed using scientific notation, another scale, pH, is commonly used to report acidity. Just like pka, pH is logarithmic, reported as the power of ten with a sign change. pH = - log [H30*] 8.16 Pure water has a pH equal to seven (from [H30*] = 10-7), and a complete range of pH values appear in Table 9.4. The concentration of acid increases as the value of pH decreases; the smaller the pH, the more acidic a solution. Each pH unit represents a 10-fold change in concentration. Table 9.4 also shows the concentration of hydroxide in each solution, calculated from the ion product of water (equation 8.15). Question 8.16 Homework • Unanswered If [H30+] = 1M, provide the hydroxide ion concentration [HO¯] by performing a calculation using equation 8.15. Please input your answer in the format 1E-7 (with no units). Type your answer and submit Unanswered . 5 attempts left Submit
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