Please do this Chemistry quiz

Anonymous
timer Asked: Oct 21st, 2018
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Question description

Please finish this chemistry quiz ASAP. Show all the steps for the solutions. Make sure all the answers are correct. Thank you.

Please do this Chemistry quiz
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Please do this Chemistry quiz
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Tutor Answer

Professor_Aldin
School: New York University

Everything is done :). Kindly see attached and hope to have you again in future :)

1. What is the oxidation state of chromium in CaCro4?
Answer:
Given that:
Ca = + 2
O = -2
so, +2 - 8 = 6
CaCrO4 = [+𝟐 + 𝟔 − 𝟖 = 𝟎]
2. You titrate 25.00 ml of 2.05 M sulfuric acid (above) with 38.75 mL of sodium hydroxide. What
is the molarity of the sodium hydroxide solution?
H2SO4 + NaOH) → H2O + Na SOC)
Answer:
Let, V1 be the volume of NaOH solution,i.e, V1 =25 ml
S1 be the molarity/ strength of NaOH ( which is to be calculated)
V2 be the volume of HCl required to neutralize NaOH,i.e., V2 = 38.75 ml
S2 be the strength of HCl, i.e., S2 = 2.05 M
We know, for acid-base titration, V1S1=V2S2 or S 1=(V2S2)/ V1
Putting the values we get , S 1= (38.75*2.05)/ 25 = 1.9859 g
3. iron (II...

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Review

Anonymous
Wow this is really good.... didn't expect it. Sweet!!!!

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