Because H2S is a weak acid (and HS- is an even weaker one) and the presense of a strong acid drives the equilibrium back the other way.
By the way, the correct spelling is "sulfide." This is according to both IUPAC and the Royal Society of Chemistry, so even being a Brit doesn't excuse the ph.
The pH scale measures how acidic or basic a substance is.A pH less than 7 is acidic, and a pH greater than 7 is basic.hence a level of 5 is acidic.
Litmus paper is a tool to identify the acidic or basic character of a substance and without water the acidic or basic nature is meaning less.
A Ph of 7 is neutral, anything more is acidic, anything less is basic.
Neither is acidic, both are basic. But milk of magnesia is less basic and therefore more acidic.
Acidic liquids tend to rust a paper clip faster than basic liquids. Acidic solutions, such as vinegar or lemon juice, can accelerate the corrosion process by increasing the rate of oxidation of the metal in the paper clip. Basic liquids, on the other hand, are less corrosive and are less likely to cause rusting in a paper clip.
pH 0 < acidic < pH 7 neutral = pH 7 pH 7 < basic < pH 14
Basic solutions have a higher concentration of hydroxide ions (OH-) compared to acidic solutions. This property allows basic solutions to have a pH greater than 7, while acidic solutions have a pH less than 7.
Alkaline substances are basic, having a pH greater than 7. They are the opposite of acidic substances, which have a pH less than 7.
Pure water is neutral, with a pH of 7. However, water can become slightly acidic or basic by dissolving substances in it.
A pH of 7 is neutral A pH of less than 7 is acidic and a pH greater than 7 is basic.
This would represent a mild base (or basic) solution. Greater than 7.0 = basic. Less than 7.0 = acidic.
You seem to be confused. acidic and basic are not things, they are properties. For example, vinegar is a solution, and it is acidic, because in solution, it dissolves to release hydrogen ions. Basic solutions, such as bleach, either accept hydronium ions in solution, or release hydroxide ions in solution. But all solutions, with the exception of distilled water, is either definatively acidic or basic. Look up a pH meter or a pH scale. The lower the number, the more acidic a solution is. The higher the number is, the more basic a solution is, and if it is 7.0, then it is neutral.