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Litmus paper, other types of pH paper, phenolphtalein, etc.

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12y ago

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What ions cause an acid-base indicator to change?

Hydrogen ions (H+) and hydroxide ions (OH-) cause an acid-base indicator to change color. In an acidic solution, there are more H+ ions present, causing the indicator to appear a certain color. In a basic solution, there are more OH- ions present, resulting in a different color being displayed by the indicator.


Which molecule represents an ion found in a glass of water?

OH- and H+


What does the pH scale measure the concentration of?

The pH scale is a Science indicator, Not a Mathmatical one :-)


How is a acid and a base different?

An acid has more H+ ions than OH- ions, while a base has more OH- ions than H+ ions.


Why some acids have OH ions?

Acids add Hydrogen Ions (H+) and not OH ions


Is a substance with equal numbers of H ions of OH - ions an alkaline solution?

Yes, a substance with equal numbers of H+ ions and OH- ions is an alkaline solution because it has a pH greater than 7. The presence of equal numbers of H+ and OH- ions indicates a neutralization reaction, forming water as a product.


Where do the H plus and OH- ions come from?

In neutralisation reactions H+ and OH- ions come from the dissociation of water, H2O, which is part of the solution.Water dissociates in equilibrium, shown as:H2O(l) H+(aq) + OH-(aq)


How does the H compare to OH- in a neutral solution?

In a neutral solution, the concentration of H+ ions (protons) is equal to the concentration of OH- ions (hydroxide) due to water's auto-ionization. The pH of the solution is 7 since it is a measure of the concentration of protons.


Does a acid produce oh-ions?

acid produces H+ ions base produces OH- ions


Is it true that a substance with equal numbers of H ions and OH- ions is a basic solution?

No, a substance with equal numbers of H+ ions and OH- ions is not necessarily a basic solution. In fact, a solution with equal concentrations of H+ and OH- ions is considered neutral, with a pH of 7. Basic solutions have a higher concentration of OH- ions compared to H+ ions, resulting in a pH greater than 7.


How water forms ions?

Ions of water are H+ and OH-.


Is it true that solutions that have an equal concentration of H plus ions and OH- are considered acidic?

False - such a solution is considered "neutral"...neither acidic nor alkaline (basic).