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hjlf
3 years ago
9

Hard water deposits (calcium carbonate) have built up around your bathroom sink. which of these substances would be most effecti

ve in dissolving the deposits
Chemistry
2 answers:
brilliants [131]3 years ago
7 0
The answer would be: <span> vinegar (acetic acid).

To dissolve deposit that calcified, you need to dissolve the calcium. Calcium is one of the metal that makes base pH. It will react with acid compound and produce a molecule of water. Ammonia, bleach, lye </span><span>, and baking soda are all base and won't react with the </span><span>calcium carbonate. Vinegar is acid and will react to it.

</span>
Stolb23 [73]3 years ago
6 0
Hello!

Vinegar would be most effective in dissolving the deposits of Hard Water.

Vinegar (CH₃COOH) is a weak acid, while Calcium Carbonate (CaCO₃), being the salt of a weak acid, will be a weak base. These two compounds will react together in the following way:

2CH₃COOH + CaCO₃ → (CH₃COO)₂Ca + H₂CO₃

H₂CO₃ reacts further to yield Water and CO₂

H₂CO₃ → H₂O + CO₂(g)

So, vinegar would be effective at dissolving CaCO₃, and we should see bubbles as a proof that a reaction has occurred.

Have a nice day!
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Answer:

C) mass.

Explanation:

The speed of a body is given by the relation between the displacement of a body in a given time. It can be considered the greatness that measures how fast a body moves.

Speed analysis is divided into two main topics: average speed and instantaneous speed. It is considered a vector quantity, that is, it has a module (numerical value), a direction (Ex .: vertical, horizontal) and a direction (Ex .: forward, upwards). However, for elementary problems, where there is displacement in only one direction, the so-called one-dimensional movement, it is advisable to treat it as a scalar quantity (with only numerical value).

The mass of an object is not an important factor in determining the speed of that object. However, time, direction and distance are important factors in determining speed.

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3 years ago
13. Sodium, Na, shows metallic properties. Identify another element that is likely to show similar metallic properties.
Deffense [45]

Answer:

19.K, potassium

Explanation:

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OLga [1]
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