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4 years ago

Why a slight change in the PH of solutions in living things could result in the death of the organism?

1 answer:

5 0

Enzymes and proteins are extremely susceptible to pH changes which causes them to denature (lose the shape that gives them function). This denaturing is permanent for enzymes. A slight pH change could severely damage organ systems reducing there efficiency or completely halting their processes.

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Describe use of H₂S an analytical reagent?

Gemiola [76]

Answer:

The main use for hydrogen sulfide is in the production of sulfuric acid and elemental sulfur. ... H2S is used to prepare the inorganic sulfides you need to make those products. As a reagent and intermediate, hydrogen sulfide is beneficial because it can prepare other types of reduced sulfur compounds.

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3 years ago

If all three metals were exposed to extremely high temperatures, which would be the last to melt? (copper, gold, mercury)

Harlamova29_29 [7]

Answer:

I believe its Gold

Explanation:

5 0

3 years ago

Read 2 more answers

A chemist must prepare 800.0mL of sodium hydroxide solution with a pH of 12.10 at 25°C. She will do this in three steps: Fill a

AnnZ [28]

Answer:

0.42 g

Explanation:

We have:

pH = 12.10 (25 °C)

V = 800.0 mL = 0.800 L

To find the mass of sodium hydroxide (NaOH) we can use the pH:

$14 = pH + pOH$

$pOH = 14 - pH = 14 - 12.10 = 1.90$

$pOH = -log ([OH^{-}])$

$[OH]^{-} = 10^{-pOH} = 10^{-1.90} = 0.013 M$

Now, we can find the number of moles (η) of OH:

$\eta = ([OH]^{-})*V = 0.013 mol/L * 0.800 L = 1.04 \cdot 10^{-2} moles$

Since we have 1 mol of OH in 1 mol of NaOH, the number of moles of NaOH is equal to 1.04x10⁻² moles.

Finally, with the number of moles we can find the mass of NaOH:

$m = \eta * M$

Where M is the molar mass of NaOH = 39.9 g/mol

$m = 1.04 \cdot 10^{-2} moles * 39.9 g/mol = 0.42 g$

Therefore, the mass of sodium hydroxide that the chemist must weigh out in the second step is 0.42 g.

I hope it helps you!

3 0

3 years ago

Which of the samples described below contains the FEWEST atoms? No calculation is needed to answer this question.

Monica [59]

Hello!

To do this, use the molar mass. This is how much a mole of an atom weighs. A mole is 6.02214076×10²³ atoms.

Molar masses of:

Se: 78.96 g/mol

Cu: 63.546 g/mol

Ba: 137.327 g/mol

Now, the element with the highest molar mass will have the fewest atoms. This is because the element weighs more, so therefore for the same amount of mass, there will be less of the element needed to reach that mass.

Therefore, 10g of Ba would have the fewest number of atoms.

Hope this helps!

6 0

4 years ago

What is the reactants for this question?

kondor19780726 [428]

Oxygen, Hydrogen, ammonium perchlorate and powdered aluminum.

8 0

3 years ago

Why a slight change in the PH of solutions in living things could result in the death of the organism?​

Why a slight change in the PH of solutions in living things could result in the death of the organism?