QQuestionChemistry
QuestionChemistry
Guess how many water molecules self-ionize in one liter of water!
A. 7 moles
B. 1 mole
C. 10,000,000 moles
D. 0.0000001 moles
12 months agoReport content
Answer
Full Solution Locked
Sign in to view the complete step-by-step solution and unlock all study resources.
Step 1:Let's solve this step by step:
Step 2:: Understand Self-Ionization of Water
\mathrm{H}_2\mathrm{O} \rightleftharpoons \mathrm{H}^{+} + \mathrm{OH}^{-}
Water molecules undergo self-ionization (autoionization), where a small number of water molecules split into hydrogen and hydroxide ions:
Step 3:: Calculate the Concentration of Ions
The ion product of water ($$K_w$$) at 25°C is $$1.0 \times 10^{-14}$$.
This means the concentration of \mathrm{H}^{+} and \mathrm{OH}^{-} is 1.0 \times 10^{- 7} moles per liter.
Step 4:: Convert Concentration to Moles
1.0 \times 10^{-7} \text{ moles/L} \times 1 \text{ L} = 1.0 \times 10^{-7} \text{ moles}
In one liter of water:
Final Answer
D. 0.0000001 moles (1.0 \times 10^{- 7} moles)
Need Help with Homework?
Stuck on a difficult problem? We've got you covered:
- Post your question or upload an image
- Get instant step-by-step solutions
- Learn from our AI and community of students