3 years ago

How does a buffer work

1 answer:

8 0

A buffer is simply a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid. Buffers work by reacting with any added acid or base to control the pH.

Hope this helps

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Why are liquids often dense?

Sophie [7]

The answer: The answer is B

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3 years ago

What is a picture of homologous pairs of chromosomes and sex chromosomes?

Alecsey [184]

Answer:

allene?

Explanation:

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3 years ago

Read 2 more answers

What is the freezing point of a solution prepared from 45.0 g ethylene glycol (C2H6O2) and 85.0 g H2O? Kf of water is 1.86°C/m.

Andrews [41]

Answer:

$T_{sol}=-15.9\°C$

Explanation:

Hello,

In this case, we can analyze the colligative property of solutions - freezing point depression - for the formed solution when ethylene glycol mixes with water. Thus, since water freezes at 0 °C, we can compute the freezing point of the solution as shown below:

$T_{sol}=T_{water}-i*m*Kf$

Whereas the van't Hoff factor for this solute is 1 as it is nonionizing and the molality is:

$m=\frac{mol_{solute}}{kg\ of\ water}=\frac{45.0g*\frac{1mol}{62g} }{85.0g*\frac{1kg}{1000g} } =8.54m$

Thus, we obtain:

$T_{sol}=0\°C+(-8.54m*1.86\frac{\°C}{m} )\\\\T_{sol}=-15.9\°C$

Best regards.

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3 years ago

When you count up the electrons in a Lewis Structure, do double and triple bonds count as 4 or 6 electrons?

natima [27]

Answer:

Double=4 and triple=6

Explanation:

This is because double bonds are two pairs of electrons are shared between atoms and triple bonds are three pairs, and one pair of electrons is 2, so 2 x 2=4 and 2 x 3=6.

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3 years ago

3. Identify at least TWO acidic lakes or other bodies of water in Washington State.

poizon [28]

Answer:

I cant find any answers for u unfortunately

Explanation:

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2 years ago