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lisabon 2012 [21]
3 years ago
10

Can anyone teach me how to do double replacement?? please, im taking the AP test in a couple of hours. please dont just copy som

ething off somewhere else. i need someone who actually understands and i can ask questions to
Chemistry
1 answer:
inysia [295]3 years ago
4 0

Answer:

Step 1: Identify the Individual Ions from the Reactants and Their Charges

Step 2: Switch the Cations and Anions of the reactants

Step 3: Balance the Chemical Reaction

Explanation:

i hope i helped =)

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Lakes that have been acidified by acid rain can be neutralized by limiting the addition of limestone how much limestone is requi
svet-max [94.6K]
From the given pH, we calculate the concentration of H+:
     [H+] = 10^-pH = 10^-5.5
We then use the volume to solve for the number of moles of H+:
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From the balanced equation of the neutralization of hydrogen ion by limestone written as
     CaCO3(s) + 2H+(aq)  → Ca2+(aq) + H2CO3(aq)
we use the mole ratio of limestone CaCO3 and H+ from their coefficients, which is 1 mole of CaCO3 is to react with 2 moles of H+, to compute for the mass of the limestone:
     mass CaCO3 = 13598mol H+(1mol CaCO3/2mol H+)
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Balance this equation<br><br>PB3 O4 + H2 → PB + H2O​
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Answer:

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Pb3O4

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What mass of potassium iodide is needed to prepare 5.60 L of a 1.13 M solution
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Given that the question gives us concentration (M) and volume, we can use these so get moles. remember that Molarity (M)= mol/ Liters, so if we want the moles, then

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now to get the mass in grams, we need the molar mass of potassium iodide (KI) which can be determined using the periodic table and add the masses of each atom.

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Dalton thought that atoms were indivisible particles. But Thomsons discovery of the electron proved that the subatomic particles exist.
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