Other Chemistry Answers

Consider the following reaction: Cr2O72– + 6Br– + 14 H+ à 2 Cr3+ + 3Br2 + 7H2O
In a redox titration, 14.62 mL of 0.175 M Cr2O72– was needed to completely react with a 25.00 mL sample of Br–. Calculate the [Br–] in the original solution.

A complete titration was performed by adding 0.130M NaOH to a 50.00mL sample of H3PO4 Calculate [H3PO4] from the following data.
Initial Volume of NaOH (mL): 1ST TRIAL - 6.05. 2ND TRIAL - 17.15. 3RD TRIAL - 28.10
Final Volume of NaOH (mL): 1ST TRIAL - 17.15. 2ND TRIAL - 28.10. 3RD TRIAL - 38.95
What is the final volume (mL) used for each trial?

A 25.0 mL sample of 0.150 M HIO3 is titrated with 0.240 M Sr(OH)2.

Write the net ionic equation for the above titration reaction.

Cholesterol, C27H46O, is a waxy substance found naturally in the body. Under some
circumstances cholesterol can clog the arteries. Health Canada recommends that the total
cholesterol concentration does not exceed 5.2 x 10-3 mol/L. If you have about 4.7 L of blood,
what is the maximum mass of cholesterol that your blood should contain?

Applications of paper chromatography in DNA sequencing.

Applications of paper chromatography in chemistry.

What is the final temperature of a 100. g sample of iron when it loses 2.0 kJ of heat if the initial temperature was 80.0 °C?

If 30.5 g of Potassium reacts with 70.2 g of copper nitrate, according to the following
reaction, what is the maximum number of grams of Copper that can be produced?
(balance equation first)
___ K + ___ Cu(NO 3 ) 2 �� ___ K(NO 3 ) + ___ Cu

How is potentiometry applied in
1. Chemical diagnostic
2. Environmental monitoring

7. Jenny uses 50 N of force to accelerate a block at 25 m/s2, what is the mass of the block?