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.
Zygote has total 46 chromosomes. As the Parent cells i.e, egg and sperm both have 46 chromosomes but both undergo the process of meiosis that results in half of their original number of chromosomes i.e, 23. And when egg and sperm fuse together to form zygote via fertilization then number of chromosomes again become 46.