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3 years ago

11

What is the species that determines the ph of a solution?

1 answer:

Mice21 [21]3 years ago

7 0

Not sure what you mean by species, but the ph of a solution is determined by the concentration of hydroxide and/or hydrogen. Water is the perfect neutral contain one hydrogen atom and one hydroxide atom. Bases are more basic the higher amount of hydroxide present, and vice versa.

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What will happen if a peeled banana is put on a hotplate? Will it undergo a physical or a chemical change?

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3 years ago

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3 years ago

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solong [7]

Answer:

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3 years ago

If is found that 24.68 mL of .1165 M NaOH is needed to titrate .2931 g of an unknown acid to the phenolphthalein end point. Calc

Lemur [1.5K]

Answer: The equivalent mass of the acid is 83.16 grams

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Moles of solute}={\text{Molarity of the solution}}\times{\text{Volume of solution (in L)}}$

Molarity of $NaOH$ solution = 0.1165 M

Volume of $NaOH$ solution = 24.68 mL = 0.02468 L

Putting values in equation 1, we get:

$\text{Moles of} NaOH={0.1165M}\times{0.02468L}=2.875\times 10^{-3}moles=2.875\times 10^{-3}geq$

( as acidity of NaOH is 1)

For end point: gram equivalents of acid = gram equivalents of base = $2.875\times 10^{-3}$

Mass of acid= $gram equivalents\times {\text {Equivalent mass}}$

$0.2391=2.875\times 10^{-3}\times {\text {Equivalent mass}}$

${\text {Equivalent mass}}=83.16g$

Thus equivalent mass of the acid is 83.16 grams

5 0

3 years ago

Which of these is a base ?<br><br> a.vinegar <br> b.NaOH <br> c.HNO3<br> d.HCI

sergey [27]

Answer:

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Explanation:

6 0

3 years ago

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