3 years ago

What is the ph of a solution with a hydroxide ion concentration of 10–10m?

Chemistry

1 answer:

gregori [183]3 years ago

7 0

The ph level is 10pH

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3 years ago

A 0.8115 g sample of HCl was placed into a 50 mL volumetric flask and the sample was thoroughly dissolved in water to make 50 mL

inysia [295]

Answer:

Molarity of NaOH solution is 1.009 M

Explanation:

Molar mass of HCl is 36.46 g/mol

Number moles = (mass)/(molar mass)

So, 0.8115 g of HCl = $\frac{0.8115}{36.46}moles$ HCl = 0.02226 moles HCl

1 mol of NaOH neutralizes 1 mol of HCl.

So, if molarity of NaOH solution is S(M) then moles of NaOH required to reach endpoint is $\frac{S\times 22.07}{1000}moles$

So, $\frac{S\times 22.07}{1000}=0.02226$

or, S = 1.009

So, molarity of NaOH solution is 1.009 M

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3 years ago

The work done to expand a gas is 121 J. During the gas expansion, 402 J of heat is absorbed by the gas sample. Calculate the cha

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3 years ago

2A(g) + B(l) ⇌ 3C(aq) + D(s)

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3 years ago

A flask contains 0.340 mol of liquid bromine, br2. determine the number of bromine molecules present in the flask.

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<span>Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We calculate as follows:

0.340 mol Br2 ( </span>6.022 x 10^23 molecules / mol ) = 2.05 x 10^23 molecules

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3 years ago

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