Brad is testing three solutions with litmus paper. After dipping the litmus paper strips in the solutions, he observes two paper
2 answers:
Answer: one solution is acidic
Explanation:
Acid base indicators are usually weak acids or weak bases. They change their color in the solution with change in the pH.
For any indicator say HIn , the dissociation can be shown as:
Litmus is one such indicator which turns red in acidic solutions, blue in alkaline solutions, and purple in neutral solutions.
Thus out of three solutions , the litmus paper strip is turning red in one solution, thus only one solution is acidic. the other two in which litmus is showing blue color are alkaline in nature.
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Answer:
Concentration of sulfuric acid in the acid rain sample is 0.0034467 mol/L.
Explanation:
Volume of NaOH = 1.7 ml = 0.0017 L
Molarity of NaOH = 0.0811 M
Moles of NaOH = n
n = 0.0001378 mol
According to reaction, 2 mol of NaOH neutralize 1 mol of sulfuric acid.
Then 0.0001378 mol of NaOH will neutralize:
of sulfuric acid.
Concentration of sulfuric acid in the acid rain sample: x
Concentration of sulfuric acid in the acid rain sample is 0.0034467 mol/L.