Other Chemistry Answers

Calculate the molarity (M) of the following solution

1. 316 grams of MgBr 2 in 859 mL of solution.

What mass of water was used if the temperature went from 55oc to 100oc and the energy used was 65,000 j?

Calculate the pH of the solution that was formed after mixing of 150 mL of 0.200 M H3PO4 with 150 mL of 0.266 M NaOH. Remember to use the Henderson-Hassselbach equation and appropriate pKa value choosing one from pK1=2.12, pK2=7.21, pK3=12.32

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 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?

How is potentiometry applied in

1. Chemical diagnostic

2. Environmental monitoring