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Any aqueous solution that has a pH value greater than 7 can be considered alkaline. A strongly alkaline aqueous solution usually has a pH of at least 10, and aqueous solutions of very strong alkalies can have a pH range above 13.
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Do alkalis have a pH less than 7?
no they alkaline solutions have a pH higher than 7
Are alkalis and acids dangerous?
Acids and alkalis with a high pH (1 or 2 for acids and 14 or 15 for alkalis) can be dangerous, like hydrochloric acid which can cause damage to the skin if contact with the acid is made. Acids and alkalis with a low pH (5 for acids and 11 for alkalis) aren't dangerous, as vinegar is an acid with that pH and toothpaste is an alkali.
Do some alkaline have a pH greater then 9?
Yes. Some alkalis do have a pH above 9. e.g. 46% NaOH solution.
What happens to the pH of the acid in your stomach when you take an antacid?
It increases since antacids are alkalis.
Is milk an acid or a alkalis?
fresh milk usually has a pH of around 6.7, so it is slightly acidic.
How can you tell how strong acids and alkalis are using the pH scale?
Acids have a pH under 7, alkalis have a pH bigger than 7.
Do alkalis have a pH less than 7?
no they alkaline solutions have a pH higher than 7
Weakest alkalis have a pH of?
10
Are alkalis and acids dangerous?
Acids and alkalis with a high pH (1 or 2 for acids and 14 or 15 for alkalis) can be dangerous, like hydrochloric acid which can cause damage to the skin if contact with the acid is made. Acids and alkalis with a low pH (5 for acids and 11 for alkalis) aren't dangerous, as vinegar is an acid with that pH and toothpaste is an alkali.
What makes alkalis alkalis?
Look on the pH scale. Below 7 are acids, above 7 are alkali's!! ;-)
Alkalis have a pH what than 7?
great then 7
List four properties of alkalis?
alkalis are corrosive, normally water soluble and are very soapy.
What is the pH range of solutions which are alkalis?
Alkalines, or bases, have a pH greater than 7 (maximum is 14).
What colours does ph paper turn in alkalis?
blue
Does Neutral mean safe?
Not really. On the pH scale of Acids and Alkalis, Neutral is the green colour at which a liquid is neither Acid nor Alkalis.
Is purewater acid or alkalis?
it is neither. pure water is neutral (PH 7)
Why alkalis are sometimes describe as the opposite of acids?
Alkalis (bases) react with acids to neutralize them, so in one sense, they can be considered as "opposite" of acids. Bases produce pH values >7 and acids produce pH values <7.
