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vova2212 [387]
3 years ago
9

Why is it important for all of your glassware to be clean and dry before performing a titration

Chemistry
1 answer:
ss7ja [257]3 years ago
5 0

Explanation:

It is necessary that the glassware which we use during titration needs to be clean and dry before use because otherwise the remaining reagents will get mixed up with the solutions.

As a result, this will lead to a change in analysis results.

Hence, an error will occur in the resulting values.

Also, when not cleaned properly the any other substance remaining in the glassware might react with the solution leading to a change in the solution.

In that case also, error will occur.

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i need to know like now. what is a pure substance that contains atoms of more than one element called?
Galina-37 [17]

Answer:

A compound

Explanation:

A compound is a pure substance that contains atoms of more than one element.

For example, water is a compound.  

It is pure because it consists only of water molecules, and each molecule contains atoms of the elements hydrogen and oxygen.

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Why does analyzing character motivation matter?
FrozenT [24]
It propels the plot.
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Tina rides her bike for 4 miles.it takes her 2 hours.what is her speed in miles per hour
Ksju [112]

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3 years ago
. The pI is called ________________. The rule of calculating pI of an amino acid is that first, write the dissociation equation
umka21 [38]

Answer:

The isoelectric point is that the <u>pH </u>at which the compound is in an electronically neutral form.

For diss equations<u>, p</u>lease find them in the enclosed file.

The pIs of 2 amino acids:

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Explanation:

Formula for the pI calculation: pI = (pKa1 + pKa2)/2

Given 3 pKa :

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pKa1 = 2,19; pKa2 = 4,25; so pI = 3,2

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Use the higher 2 pKas ( -COOH group and -NH= group)

pKa1 = 6; pKa2 = 9,17; so pI = 7,6

6 0
4 years ago
How many molecules are in 0.26 mol of CO2
Dominik [7]
<span>1 mole of CO2 = 6.023*10^23 molecules.3 moles of CO2 = 3*6.023*10^23 moleculestherefore, 3 moles of CO2 = 18069*10^20 molecules.
</span>
7 0
3 years ago
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