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A substance with a pH below 7 is an acid. Acids have a pH below 7, while substances with a pH above 7 are alkalis (bases).

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1y ago

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Related Questions

Is yellow acid or alkali?

Yellow is not a definitive indicator of whether a substance is an acid or an alkali. The color of a substance is not directly related to its pH or acidity levels. pH testing is required to determine if a substance is acidic or alkaline.


What is an acid an alkali and neutral?

An acid is a substance that donates hydrogen ions in a solution, resulting in a low pH (below 7). An alkali is a base that accepts hydrogen ions in a solution, leading to a high pH (above 7). Neutral substances have an equal balance of hydrogen and hydroxide ions, resulting in a pH of 7.


What is alkalis acid?

Alkali isn't an acid. Alkali and acid are terms used when the pH of a substance is a certain number, for example if a substance has a pH of 1, 2, 3, 4, or 5, then the substance is an acid. If the pH is 11, 12, 13, 14 or 15, then the substance is an alkali.


What scale is pH?

PH scale is a scale that shows the substance is PH ....... Example: The substance is PH 7, so it is neutral The substance is PH 3, so it is acid The substance is PH 10, so it is alkali


How can you identify an acid and an alkali?

You identify acids and alkalis using indicators. Indicators are substances which turns a particular colour for acids and another for bases. E.g. litmus, (acid-red, alkali-green) and phenolphthalein. Indicators have a certain pH value. You can only use a particular indicator of a suitable pH value for a particular acid-base reaction


What is the difference of litmus paper and a pH paper?

pH.paper tells the strength of an acid and alkali and litmus paper tells that whether the substance is an acid or an alkali.


If a substance is not an acid or an alkali what is it?

If a substance is not an acid or an alkali, it is considered neutral. Neutral substances have a pH of around 7, which means they are neither acidic nor basic. Water is a common example of a neutral substance.


What happens to the pH of an alkali as it is neutralised?

As an alkali is neutralized, its pH will decrease because the added acid will counteract the basic properties of the alkali. It will move closer to a neutral pH of 7 as the acid and base react to form water and a salt.


What type of substance nutralises an acid?

An alkali substance typically neutralizes an acid. Alkalis are basic in nature and can react with acids to form salts and water, achieving a neutral pH.


Do You need to have water present to see if something is an acid or an alkali.?

no


What happens to the pH when an alkali is added to a acid?

When an alkali is added to an acid, the pH increases as the acid is neutralized by the base. This reaction forms water and a salt. The pH ultimately depends on the strength of the acid and the alkali.


What shows whether something is an alkali or acid?

You can use indicators (liquid or paper). Universal Indicators (UI) are the best, as with them you can tell if something is acid, neutral or alkali, depending on the colour (there will be a colour indicator). However, you can also use red and blue indicator, but they are less accurate, as although they might be acid (or alkali), they might be neutral as well, so I suggest you use UI. Hope this helps :) Source: Science lessons!