The acidity of a solution is typically measured by pH. A pH of 7 is neutral. A pH below 7 is acidic, and a pH above 7 is basic, or alkalotic. Normal blood pH is 7.4. Having acid in the blood means that the pH is below 7.4, and excessive protons may be found in the blood.
The number of chromosomes in the secondary spermatocyte are 23 but each chromosome having two chromatids, while the chromosomes in the spermatid are also 23 but each chromosome is made up of one chromatid.
However, your germ cells (sperm in males and egg in females) have half the number of chromosomes in your somatic cells (the cells of the body other than the germ cells), that is 23 chromosomes. This is because 23 from the sperm + 23 from the egg= 46 in the zygote = 46 in the adult human. This halving from 46 to 23 chromosomes is made possible by a process termed as meiosis.