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enyata [817]
3 years ago
14

PLEASE ANSWER THIS ASAP!

Chemistry
1 answer:
telo118 [61]3 years ago
7 0

the answer to your question is

isotope

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A different brand of iron tablet was analysed by Hitration with 0.0093 mol.L" potassium
Gre4nikov [31]

The concentration of iron used in the titration : 0.009 M

<h3>Further explanation</h3>

Given

Reaction

Cr₂O₇²⁻ + 6Fe²⁺ + 14H⁺ ⇒ 2Cr³⁺ + 6Fe³⁺ + 7H₂O

0.0093 mol/L potassium  dichromate

200 cm³ of dilute acid, 25cm³   was used in the titration.

Required

the concentration of iron

Solution

Titration formula

C₁V₁n₁=C₂V₂n₂⇒ From equation : n₁=6n₂(1=Cr₂O₇, 2=Fe)

titration average : 33+32.05+32.15+32.1 / 4 = 32.325 cm³(ml)

25 cm³ of iron solution used in titration :

\tt V_1=32.325~ml\\\\V_2=25~ml\\\\C_1=0.0093~M\\\\\\\\C_1.V_1.n_2=C_2.V_2.n_1\\\\0.0093\times 32.325\times 6=C_2\times 25\times 1\\\\C_2=0.07215~M

Dilution(25 ml from 200 ml iron solution)

\tt C_2.V_2=C_1.V_1\\\\0.007215\times 25=C_1\times 200\\\\C_1=0.009~M

4 0
3 years ago
What are the reactants to burning paper and the products
posledela
<span>CO2 (carbon) is the main product that results from burning paper. The paper is the reactant When paper burns in a fire, the reactants are mostly carbon (the main substance in the paper) and oxygen (from the air).Co2 If paper is loaded with CaCO3 such as cigarette paper, CaCO3 decompose in to CaO and CO2</span>
3 0
3 years ago
I need help with these
svp [43]

Answer: 46. E 47. D 48. C 49. A

50. A 51. D 52. B 53. B 54. C

Explanation: solution attached.

5 0
3 years ago
What ions are associated with acids
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4 0
3 years ago
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Answer fast my H.W is hard
Marina86 [1]

<u>Answer:</u> The molality of MgF_2 solution is 4.013 m

<u>Explanation:</u>

Molality is defined as the amount of solute expressed in the number of moles present per kilogram of solvent. The units of molarity are mol/kg.

The formula used to calculate molarity:

     .....(1)

Given values:

Given mass of MgF_2 = 20.0 g

Molar mass of = 62.3 g/mol

Mass of solvent = 80.0 g

Putting values in equation 1, we get:

\text{Molality of }MgF_2=\frac{20.0\times 1000}{62.3\times 80.0}\\\\\text{Molality of }MgF_2=4.013m

Hence, the molality of MgF_2 solution is 4.013 m

3 0
3 years ago
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