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2 years ago

. What happens the pH of an acid solution as a base is added?

1 answer:

3 0

As a base is added to an acidic solution, the H+ ions in solution that make it acidic are slowly neutralized into water (via OH-, the base). As these ions are converted into water the concentration of them decreases, so the pH decreases, as they are directly related.

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A student mixes a solution of lead (II) nitrate with a solution of potassium iodide and notices the formation of a yellow solid.

ioda

Answer:

Lead (II) iodide

Explanation:

The reaction of lead (II) nitrate, Pb(NO₃)₂ with KI is:

Pb(NO₃)₂(aq) + 2KI(aq) → KNO₃(aq) + PbI₂(s)

This is a typical double-replacement reaction where anions and cations exchange its couple.

All nitrates are solubles, thus, KNO₃ is not the precipitate.

The only possibility of precipitate is PbI₂,

Lead (II) iodide, a yellow and insoluble solid...

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2 years ago

Write the formulae for the following and calculate the molecular mass for each one of them,

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Explanation:

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b) CaO

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c) NaCl

= 23 + 35.5

= 58.5 g/mol

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3 years ago

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Answer:

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Explanation:

sodium is the second most reactive. Magnesium being the least reactive

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. What happens the pH of an acid solution as a base is added?​

. What happens the pH of an acid solution as a base is added?