Pre lab questions.edited.doc - Pre-lab questions 1 Complete the following calculations[H pH[OH ACIDIC/BASIC OR NEUTRAL basic neutral acidic 5.3*10-5M

# Pre lab questions.edited.doc - Pre-lab questions 1 Complete...

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Pre-lab questions 1. Complete the following calculations [H+] pH [OH-] ACIDIC/BASIC OR NEUTRAL? 5.3*10-5M basic 7.0 neutral 9.6*10-4 acidic 2. difference between a ph value of 9 and 3 with an explanation Answer: The solution whose pH=3 is a stronger acid compared to the pH of 9. Explanation: PH = −log 10 [H 3 O+]. And thus [H 3 O+] =10− pH . 10 −3 >10 −9 ; 3. Look online at the ingredients for white vinegar (acidic pH), Coca-Cola (acidic pH) and an antacid (basic pH). Which ingredient(s) contribute to the pH each of these substances? substance ingredients Ingredients contributing to the substance PH. White vinegar Acetic acid Water flavors Acetic acid Coca-Cola caffeine citrate citric acid vanilla extract lime juice flavoring Citric acid Lime juice

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sugar fluid extract of coca leaves water caramel coloring antacid Magnesium hydroxide simethicone Magnesium hydroxide 4. Which of the following aqueous solutions is a buffer? Explain. o HNO 3 and NaNO 3 : No. HNO3 and NaNO3 cannot function as a buffer , because HNO3 is a strong acid.
• Summer '14
• pH, Sodium citrate

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