QQuestionChemistry
QuestionChemistry
"There are 6 strong acids you need to know. List their names and formulas below:
Names of Acids:
Acid 1
Acid 2
Acid 3
Acid 4
Acid 5
Acid 6
Formulas:
Formula 1
Formula 2
Formula 3
Formula 4
Formula 5
Formula 6
Classify each of the following as a strong acid or a weak acid. Indicate how each should be written in aqueous solution. For example, should hydrochloric acid (HCl) be written as HCl or as
H+ + Cl−?
Phosphoric acid: In solution, this acid should be written as __________.
Nitrous acid: In solution, this acid should be written as __________.
Hydrofluoric acid: In solution, this acid should be written as __________."
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Answer
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Step 1: Phosphoric acid, with the formula H^3PO^4, is a weak acid.
H_{3}PO_{4} + H_{2}O \rightleftharpoons H_{2}PO_{4}^{-} + H_{3}O^{+}
In aqueous solution, it dissociates into hydrogen ions (H+) and hydrogen phosphate ions (H^2PO^4 -). However, it only partially dissociates, meaning that not all molecules turn into ions.
Step 2: Nitrous acid, with the formula HNO^2, is also a weak acid.
HNO_{2} + H_{2}O \rightleftharpoons NO_{2}^{-} + H_{3}O^{+}
It dissociates into hydrogen ions (H+) and nitrite ions (NO^2 -) in aqueous solution. Similar to phosphoric acid, it only partially dissociates.
Final Answer
Names of Acids and their formulas: Acid 1: Phosphoric acid, H^3PO^4 Acid 2: Nitrous acid, HNO^2 Acid 3: Hydrofluoric acid, HF Acid 4: Hydrochloric acid, HCl Acid 5: Sulfuric acid, H^2SO^4 Acid 6: Nitric acid, HNO^3 In aqueous solution, phosphoric acid should be written as H^2PO^4 -, nitrous acid should be written as NO^2 -, and hydrofluoric acid should be written as F-.
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