Which one of the following gives the highest amount of hydrogen ions(H +)?
Gastric juice
The correct answer is Gastric juice.
The more H+ ions a solution has, the lower its pH. Gastric juice contains hydrochloric acid secreted by parietal cells and has a pH of about 1-2, the most acidic of the options.
Lemon juice is acidic but weaker (pH about 2.2-2.5, citric acid), milk of magnesia is a mild base (pH about 10), and sodium hydroxide solution is a strong base (pH about 13-14) with very few H+ ions.
Short trick: Lowest pH = most H+: gastric juice (1-2) < lemon (2.5) < milk of magnesia (10) < NaOH (14).
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Important Questions from Equilibrium
What is the pH of a solution prepared by dissolving $0.0025$ moles of $HNO_3$ in $250\,mL$ of water?
Which species acts as acid like behaviour in the following reaction?
\(HPO_4^{2-}+NH_4^{1+}\rightarrow H_2PO_4^{1-}+NH_3\)
Aqueous solution of CH 3COONa is:
pH of a neutral solution is ___________.
For the reaction N 2(g) + 3H 2(g) \(\rightleftharpoons\) 2NH 3(g) ΔH = -ve :
