acids / bases
What is the pH range of acids?
Acids have a pH less than 7 (0–6.9).
Question: What is the formula for molarity?
M = moles ÷ liters
Question: What is the normal pH of human blood?
Normal blood pH ≈ 7.4
Question: What is the molar mass of hydrogen (H)?
1.01 g/mol
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3
Question: What ion do acids produce in water?
Acids produce H⁺ (hydrogen ions) in water.
Question: Find the molarity of 2 moles of NaCl in 1 L of solution
M = 2.0 M
Question: Is stomach acid acidic or basic?
Stomach acid is acidic.
Question: Find the molar mass of H₂O.
Answer: 18.02 g/mol
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Question: If a solution has a pH of 3, is it acidic or basic? How do you know
pH = 3
Since 3 is less than 7, the solution is acidic.
Question: Find the molarity of 0.5 moles of KCl in 250 mL of solution
M = 2.0 M
Question: If stomach acid has a pH of 2 and blood has a pH of 7.4, which is more acidic?
Lower pH = more acidic
Question: Find the molar mass of CO₂.
Answer: 44.01 g/mol
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Question: Find the pH of a solution with [H+]=1.0×10−4
PH 4
Question: How many moles are in 3.0 L of a 0.75 M solution?
2.25 moles
Question: How many times more acidic is a pH 3 solution than a pH 5 solution?
Answer: 100 times more acidic
Question: Find the molar mass of NaCl.
Answer: 58.44 g/mol
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Question: Find the pH of a solution with [H+]=3.2×10−3
pH ≈ 2.49
Question: What volume is needed to make a 0.25 M solution using 2.0 moles?
8.0 L
Question: If a drink has [H+]=1.0×10−3, what is its pH?
pH = 3
Question: Find the molar mass of Ca(OH)₂.
Answer: 74.10 g/mol
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Mrs Schreck