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valentinak56 [21]
3 years ago
14

Which one of the following statements is TRUE? Which one of the following statements is TRUE? A buffer is an aqueous solution co

mposed of two weak acids. A buffer resists pH change by neutralizing added acids and bases. A buffer can absorb an unlimited amount of base. A buffer does not change pH when strong acid is added. None of the above are true.
Chemistry
2 answers:
kkurt [141]3 years ago
6 0

Answer:

The correct answer is "A buffer resists pH change by neutralizing added acids and bases".

Explanation:

In chemistry, a buffer is defined as an aquoeous solution that resist pH changes. Buffers are comprised of a weak acid (HA) and its conjugate base (A−) in an equilibrium relation, which results in the buffer neutralizing added acids and bases. Buffers play a crucial role in living beings since they provide a relative stable environment for the cells in what is known as homeostasis.

shtirl [24]3 years ago
6 0

Answer:

A buffer resists pH change by neutralizing added acids and bases.

Explanation:

A buffer is an aqueous solution composed of two weak acids. False. A buffer is the mixture of a weak acid with its conjugate base or vice versa.

A buffer resists pH change by neutralizing added acids and bases. True. A buffer reacts with acid or base neutralizing, thus, pH change.

A buffer can absorb an unlimited amount of base. False. A buffer works just when ratio between substances in the mixture is 1:10.

A buffer does not change pH when strong acid is added. False. A buffer decreases change of pH by addition of acid or base but pH in a buffer change when acids are added.

I hope It helps!

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Can i titrate a solution of unknown concentration with another solution of unknown concentration and still get a meaningful answ
olga2289 [7]

Answer:

No, I don't think so at least

Explanation:

In chemistry, you do calculations to find the concentration of a solution with another solution of KNOWN concentration. Without concentrations of either solution, were would you get values from? Where would you start? :3

6 0
3 years ago
A map here shows the motion of a tectonic plate off the coast of the western united states. Which evidence supports the theory o
notsponge [240]

Answer:

Fossils, the shape of continents, the mid-ocean ridge system, sea floor sediment deposits, and the magnetism of rocks.

Explanation:

Fossils, the continent's shape, the mid-ocean ridge system, sea floor sediment deposits, and the magnetism of rocks on the sea floor are the evidences that support the theory of plate tectonics in the area. Fossils provides information to us when and where plants and animals once existed. Due to diverging plates, some life became isolated, and evolved into new species. Continental ‘fit’ through coastline matching. Some division of continents look as though they should fit together, e.g. South America and Africa.

7 0
3 years ago
I need help! What arrange these elements in order of increasing density: gallium, germanium arsenic
solong [7]

Answer:

germanium -5.5g/cm^3

arsenic -5.73g/cm^3

gallium -5.91g/cm^3

Explanation:

I hope I helped

3 0
2 years ago
Ten times a number increased by 5 is greater than twelve times a number decreased by one.
Anestetic [448]

If you are asking for the formula, here it is. \

10x+5>12x-1

4 0
3 years ago
Read 2 more answers
Convert 4.57X-3m to the equivalent length in nanometers
siniylev [52]

Answer:

                       4.57 × 10⁶  nanometers  

Explanation:

                    In this problem we are asked to convert between two units i.e. a meter into nanometer. In sciences, the different units are used for a same quantity (achieved by multiplying conversion factors) to get rid of very small values and get a readable and  intelligible values.

For Example:

In given statement the value of small distance is 4.5 × 10⁻³ meter the real number form of this number is 0.00457. Hence, this number can be converted to a very large number by multiplying it with 10⁹ or 1000000000. Hence,

                         4.5 × 10⁻³  × 1.0 × 10⁹  =  4.57 × 10⁶

Or,

                 4.5 × 10⁻³  meters  =  4.57 × 10⁶  nanometers    

Although the quantity is the same for same units but the number has changed.          

4 0
3 years ago
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