Please do this Chemistry quiz

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
Please do this Chemistry quiz

Tutor Answer

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

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