Other Chemistry Answers

The following set of lead determinations on separate aliquots of a pooled blood serum were reported: 103, 106, 107, and 114 meq/L. One value appears suspect. Should the suspected be retained or discarded at 95% confidence level.

7. The following substances will get mixed together. One will act as a Bronsted-Lowry acid and the other will act as the Bronsted-Lowry base.]

i) Write the equilibrium reaction that will occur when they are mixed. (2 marks)

ii) Label the acid and base in the reactant side (1 mark)

iii) Label the conjugate acid and conjugate base in the product side (1 mark)

a. HCN and F

b. HPO4 2- and SO4 2-

(a)               The following set of lead determinations on separate aliquots of a pooled blood serum were reported: 103, 106, 107, and 114 meq/L. One value appears suspect. Should the suspected be retained or discarded at 95% confidence level.

Given the electrochemical equivalent of a metal (m^2+) as 3.6x10^-3.

determine the relative atomic mass of the metal M.

what quantity of electricity will liberate 20g of this metal? (f = 96500)

Calcute the value of∆rH in kJ mol -1 for dissolving of solid NaOH in water, it is found when 10 g of NaOH is dissolved in 250 ml water the temperature of the water increases from 25°c to 29°c

A TOOTHPASTE HAS AN ACTIVE INGREDIENT SODIUM FLOURIDE. WHAT IS THE PERCENTAGE COMPOSITION OF FLUORIDE IN THE COMPOUND?