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What is the pH of a 0.1 M solution of hydrochloric acid (HCl)?
What is the pH of a 0.1 M solution of hydrochloric acid (HCl)?
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What is the pH of a 0.1 M solution of hydrochloric acid (HCl)?
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The pH of a strong acid like HCl is calculated using the formula pH = -log[H+]. For 0.1 M HCl, [H+] = 0.1 M, so pH = -log(0.1) = 1.
Questions & Step-by-step Solutions
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Q: What is the pH of a 0.1 M solution of hydrochloric acid (HCl)?
Solution:
The pH of a strong acid like HCl is calculated using the formula pH = -log[H+]. For 0.1 M HCl, [H+] = 0.1 M, so pH = -log(0.1) = 1.
Steps: 6
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Step 1: Understand that hydrochloric acid (HCl) is a strong acid, which means it completely dissociates in water.
Step 2: Know that when HCl dissociates, it produces hydrogen ions (H+). For a 0.1 M solution of HCl, the concentration of H+ ions is also 0.1 M.
Step 3: Use the formula for pH, which is pH = -log[H+].
Step 4: Substitute the concentration of H+ into the formula: pH = -log(0.1).
Step 5: Calculate the logarithm: log(0.1) is equal to -1.
Step 6: Therefore, pH = -(-1) = 1.
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