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nlexa [21]
3 years ago
7

What substance would you add to nahco3(aq) to form a buffer solution?

Chemistry
2 answers:
Nuetrik [128]3 years ago
8 0

Answer is: H₂CO₃.

This buffer is example of weak acid (H₂CO₃) and its conjugate base (HCO₃⁻).

Dissociation of carbonic acid: H₂CO₃(aq) ⇄ HCO₃⁻(aq) + H⁺(aq).

Adding acid: HCO₃⁻(aq) + H⁺(aq ⇄ H₂CO₃(aq).

A buffer can be defined as a substance that prevents the pH of a solution from changing by either releasing or absorbing H⁺ in a solution.  

Buffer is a solution that can resist pH change upon the addition of an acidic or basic components and it is able to neutralize small amounts of added acid or base, pH of the solution is relatively stable.  

ira [324]3 years ago
7 0
Buffer solution is made by mixing a weak acid with its conjugate base or weak base with its conjugate acid. NaHCO₃(aq) is a conjugate salt and also a conjugate base of H₂CO₃(aq) acid. Hence H₂CO₃(aq) should be added to make the buffer solution.
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Answer:

  1. Starch is a polysaccharide comprising glucose monomers joined in α 1,4 linkages. or
  2. Starch is a long-chain polymer of glucose molecules joined together. or
  3. A starch is a complex polysaccharide made up of a large number of glucose units joined together by glycosidic bonds.

Explanation:

starch, a white, granular, organic chemical that is produced by all green plants. Starch is a soft, white, tasteless powder that is insoluble in cold water, alcohol, or other solvents.

Starch is amongst the most abundant plant products and is a mixture of two polymers, amylose and amylopectin. During food processing starch is transformed by hydrothermal treatments. ... The structure of starch is also influenced by specific and non-specific interactions with other food constituents and ingredients.

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3 years ago
EZ POINTS!!!<br>what are 3 physical changes of wood.​
VARVARA [1.3K]
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To convert from liters/second to cubic gallons/minute, multiply the number of liters/second by 15.850 0 0.0353 00.2642 0 60
ivanzaharov [21]

Answer: 15.850

Explanation:

The conversion used from liters to gallons is:

1 L = 0.264172 gallon

The conversion used from sec to min is:

60 sec = 1 min

1 sec =\frac{1}{60}\times 1=0.017min

We are asked: liters/sec = gallons/min

liters/sec=\frac{0.264172}{0.017}=15.850gallons/min

Therefore, to convert from liters/second to gallons/minute, multiply the number of liters/second by 15.850.

8 0
4 years ago
Mario believes he has found the reason that some things glow in the dark while others do not. What is the most important thing h
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B. <span>Develop experiments that can be repeated to test his theory.</span>
3 0
4 years ago
Identify the bronsted-lowry acid and the bronsted-lowry base in this reaction on the left side of each of the following equation
Dahasolnce [82]

<u>Answer:</u> NH_4^+ is an acid, CN^- is a base, NH_3 is conjugate base and HCN is conjugate acid

<u>Explanation:</u>

According to Bronsted and Lowry's theory:

An acid is defined as a proton donor while a base is defined as a proton acceptor.

In a chemical reaction, an acid loses a proton to form a conjugate base while a base accepts a proton to form conjugate acid.

For the given chemical reaction:

NH_4^+(aq)+CN^-(aq)\rightleftharpoons HCN(aq)+NH_3(aq)

NH_4^+ is losing a proton thus it is an acid to form NH_3 which is its conjugate base

CN^- is gaining a proton thus it is a base to form HCN which is its conjugate acid

Hence, NH_4^+ is an acid, CN^- is a base, NH_3 is conjugate base and HCN is conjugate acid

7 0
3 years ago
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