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3 years ago

For which salt should the aqueous solubility be most sensitive to ph?

1 answer:

6 0

The salt that its aqueous solubility most sensitive to pH would be calcium fluoride (CaF2). It is an insoluble salt which when reacted with an acid, it yields this equation:

CaF2 (s) + 2 HX (aq) → 2 HF (aq) + CaX2 (aq)

Since it produces H+ and and OH- when combined with water, it is therefore sensitive to pH.

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Which of the following is the largest? cg, dg, mg, or ng

katrin [286]

The correct answer is: [C]: " mg " {"milligrams"} .
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2 years ago

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Andrej [43]

Answer:

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Explanation:

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2 years ago

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3 years ago

Bromine has two isotopes 79Br and 81Br, whose masses (78.9183 and 80.9163 amu) and abundances (50.69% and 49.31%, respectively)

Reika [66]

Answer:

Average atomic mass = 79.9034 amu

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})$

Given that:

For first isotope:

% = 50.69 %

Mass = 78.9183 amu

For second isotope:

% = 49.31 %

Mass = 80.9163 amu

Thus,

$Average\ atomic\ mass=\frac{50.69}{100}\times {78.9183}+\frac{49.31}{100}\times {80.9163}\ amu$

$Average\ atomic\ mass=40.0036+39.8998\ amu$

Average atomic mass = 79.9034 amu

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2 years ago

If you measure the mass of a liquid is 11.50 g and its volume as 9.03 ml how many significant figures should its density value h

MAXImum [283]

To get a result with the best degree of precision, the number of significant figures should be equal to the smallest number of significant figures of the given numbers. In this case, the smallest is 3 as given by the number 9.03 mL.

Therefore density is:

11.50 g / 9.03 mL = 1.27 g/mL

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2 years ago

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