Which of the following statements about monosaccharide structure is true?
a) aldoses and ketoses differ in the position of their hydroxyl groups.
b) monosaccharides can be classified according to the spatial arrangement of their atoms.
c) all monosaccharides contain carbon, hydrogen, oxygen, and nitrogen atoms.
d) a six-carbon sugar is called a pentose

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.