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4 years ago

Using the Brønsted theory, classify the following as either an acid or a base by placing the compound in the correct bin.

Chemistry

2 answers:

guapka [62]4 years ago

7 0

Answer : The Bronsted-Lowry theory was not against the Arrhenius theory, rather it was just a modification to the previous theory of acids and bases. Hydroxide ions are considered as bases because they have the tendency to accept hydrogen ions from acids and form water.

An acid was the one which produces hydrogen ions in solution because it reacts with the water molecules by giving a proton to them.

In a nutshell, he described bases as hydrogen acceptor and acids as hydrogen donors.

cricket20 [7]4 years ago

3 0

Acid = donor (giver) proton (H + ion)

Base = acceptor (receiver) proton (H + ion)

<h3><em>Further explanation</em></h3>

Based on Bronsted-Lowry Theory, acid is an ion/molecule that acts as a proton donor (H +) to other ions/molecules. While bases are ions/molecules that act as proton acceptors (H +).

If an acid gives its proton (H +), then the rest of the acid can accept the proton and function as the conjugate base of the acid

Conversely, if a base is a proton acceptor (H +), then the ion/molecule formed can release the proton and function as a conjugate acid from that base. In general, these conjugate acid-base pairs can be described as follows:

Example

NH₃ (aq) + H₂O (l) ------> NH₄ + (aq) + OH– (aq)

Basa Asam Asam Basa

The acid-base conjugate pair is:

NH₃ and NH₄

H₂O and OH-

H₂O as an acid gives a proton to NH₃ so that it becomes NH₄ so that the remaining OH- as its conjugate base

While NH₃ as a base and NH₄ as a conjugate acid

Example 2:

HOCN + H₂O ------> H₃O⁺ + OCN⁻

The conjugate base of HOCN is OCN⁻ because OCN⁻ is the proton acceptor of H⁺ to form HOCN (as an acid)

<h3><em>Learn more</em></h3>

the Bronsted-Lowry definition of an acid

brainly.com/question/3201146

the Bronsted-Lowry definition of a base

brainly.com/question/4083753

the acids and the bases in the chemical equation according to Bronsted-Lowry Theory

brainly.com/question/12308171

Keywords: Bronsted-Lowry Theory, acid, base, proton, donor, acceptor, acid-base conjugate

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Galina-37 [17]

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3 years ago

Which of the following molecules or ions is polar? (20 POINTS)

inessss [21]

Answer:

All of these three are polar molecules or ions

Explanation:

1) CO3 ^2-

It is a polar ion because it consists of one Oxygen atom and three carbon atoms so there is a substantial electroegativity difference between carbon and Oxygen due to which shared electrons are attracted more towards Oxygen creating partial negative charge on it and less towards carbon creating a partial positive charge on it, which makes the overall ion polar.

2) HCN

HCN is a polar molecule because there is substantial electronegativity difference between Carbon and Hydrogen as well as between Carbon and Nitrogen. Due to this negative charge is induced over Nitrogen because electronegativity of Nitrogen is 3.0 and positive charge on Carbon because its electronegativity is 2.5. The overall molecule is polar.

3) NO3^-1

Nitrate ion is also a polar molecule because there are three atoms of Oxygen and one atom of Nitrogen. There is substantial electronegativity difference between oxygen (3.44) and nitrogen (3.0) due to which partial positive charge is created on Nitrogen and partial negative charge created over three Oxygen atoms. The overall molecule is polar.

Hope it helps!

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4 years ago

10. What could the pH of a solution be if a cyanidin indicator turned blue? What is used to determine the endpoint of a titratio

Leviafan [203]

Answer:

The cyanidin indicator turns blue within a pH range of 5 - 7. The pH of the solution could be 5, 6 or 7.

An indicator is used to determine the endpoint of a titration.

Explanation:

Cyanidin indicator changes colour with each change in pH. In acidic solutions (pH < 7) cyanidin indicator will turn red, through to purple and blue, while in basic solutions (pH > 7), cyanidin indicator will change colour from aquamarine through to green and yellow. The cyanidin indicator turns blue within a pH range of 5 - 7.

Titration is a technique used in analytical chemistry to determine the unknown concentration of a solution. A solution of known concentration is added from a burette to the solution of unknown concentration until the reaction between the two solutions is complete. This known as the endpoint of the experiment. The endpoint of a titration is determined using an indicator which is added to reaction mixture. A colour charge is produced by the indicator at the endpoint of the reaction.

Note: An indicator is a dye of weak organic acids or bases which changes colour with changes in the pH of a solution. Some common indicators are methyl orange, methyl red, phenolphthalein, etc. These indicators are used to monitor the changes in the pH of solutions during a reaction.

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3 years ago

You leave for school late when you are pulled over by a police officer for speeding. He clocks you at 52 mi/hr . What is your sp

yawa3891 [41]

Answer:

Explanation:

The maximum speed limit in Prince Edward Island

unless otherwise posted is 80 kilometres per hour

(km/h). The basic speed limits are:

• 40 km/h (25 mph) in most municipalities

(municipalities may establish the maximum

speed limit within their boundaries);

• 50 km/h (30 mph) in urban areas;

• 60 km/h (40 mph) in school zones designated as

such by the erection of signs at the entrance and

the exit, between 8 a.m. and 5 p.m. when

children are present on or near the highway on

school days;

• 80 km/h (50 mph) on most provincial highways;

and

• 90 km/h (55 mph) on the TransCanada and

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Posted speed limits indicate the maximum safe

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4 years ago

The statement “the scientific process is open ended” means:

mina [271]

Answer:

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<h2>Explanation:</h2>

<em><u>The statement “the scientific process is open ended” means: Would an element with 7 valence electrons be more or less reactive than an element with 3 valence electrons? Element 1 is a hard dark-red solid</u></em>

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3 years ago