Chemistry, 12.10.2019 21:30 cselder

If 50 ml of 0.2 m nac2h3o2 and 10 ml of 1.0 m hc2h3o2 are diluted to a final volume of 100 ml, what is the ph of the buffer solution?

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Most of these look like dilution questions which follow a general pattern;
Use M1V1 = M2V2 (because moles in a solution stays constant if diluted)

so, the Concentration before * Volume before = Concentration after * Volume after

Using the first question as an example; 0.2*50 = 100 * M2
Rearranging for M2: 0.1

Therefore the concentration of the final solution is 0.1 M
we know that to work out pH you must use negative logs to base 10; i.e. -log(0.1) gives you the pH for this solution which is 1

Answer from: Quest

1.consider the following balanced equation and answer parts a through. show calculations for each part.

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.

explanation:

Answer from: Quest

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

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If 50 ml of 0.2 m nac2h3o2 and 10 ml of 1.0 m hc2h3o2 are diluted to a final volume of 100 ml, what...

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