Calibration of a glass electrode gave a reading of 128.9 mv with saturated potassium hydrogen tartrate buffer standard (ph = 3.557) and a reading of -98.8 mv with 0.008695 potassium dihydrogen phosphate, 0.0343 m disodium hydrogen phosphate buffer standard (ph = 7.400), both measured at 30°c.
(a) what is the observed slope (mv/ph unit) of the calibration curve?
(b) what is the theoretical slope at 30°c?
(c) what is β, the electromotive efficiency to three significant figures? ? open the hint panel below for the definition of electromotive efficiency.
(d) what is the ph of an unknown that gives a reading of 24.0 mv with this electrode at 30°c?

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced

What is the most important factor in determining climates.

Acetylene gas c2h2 undergoes combustion to produce carbon dioxide and water vapor how many grams of water are produced by the same amount of c2h2?