The half-equivalence point of a titration occurs half way to the
end point, where half of the analyte has reacted to form its
conjugate, and the other half still remains unreacted. If 0.460
moles of a monoprotic weak acid (Ka = 1.0 × 10-5) is titrated with
NaOH, what is the pH of the solution at the half-equivalence
point?
Calculate the [H ] and pH of a 0.000117 M iodoacetic acid
solution. Keep in mind that the Ka of iodoacetic...
Draw a convex quadrilateral ABCD, where the diagonals intersect
at point M. Prove: If ABCD is a parallelogram, then M is the
midpoint of each diagonal.
Point charges of 9.00 nC are situated at each of three corners
of a square whose side is 0.450 m .
a. What is the magnitude of the resultant force on a point
charge of -4.00 μC if it is placed at the center of the
square?
b. What is the magnitude of the resultant force on a point
charge of -4.00 μC if it is placed at the vacant corner of
the square?
a) Prove stereographic projection maps circles not containing
(0,0,1) from the upper half sphere’s surface into circles on the z
= 0 projection plane. b) What happens under stereographic
projection to circles containing (0,0,1), or otherwise the North
Pole? Draw a sketch showing this.
From a point 96 ft above the ground, a stone is thrown
in such a way that it is at the same point: 3 sec after it was
thrown, as it was 2 sec after it was thrown. How long does it take
the stone to reach the ground?