Multiple Choice
How many grams of NaCl (molar mass = 58.44 g/mol) are needed to prepare 1.00 mol of Na+ ions?
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2. Atoms & Elements
Calculating Molar Mass
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If the concentration of HNO3 is 0.01 M, what is the concentration of H+ ions in the solution?
A
0.01 M
B
0.02 M
C
0.1 M
D
0.005 M
Verified step by step guidance1
Recognize that HNO3 (nitric acid) is a strong acid, which means it completely dissociates in aqueous solution into H+ and NO3- ions.
Write the dissociation equation: \(\mathrm{HNO_3 \rightarrow H^+ + NO_3^-}\).
Since the dissociation is complete, the concentration of H+ ions will be equal to the initial concentration of HNO3.
Therefore, the concentration of H+ ions is the same as the concentration of HNO3, which is 0.01 M.
Conclude that the concentration of H+ ions in the solution is 0.01 M.
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