The blood in a healthy person

In a healthy person, the blood pH is 7.36 + 7.45, i.e., the blood has a slightly alkaline reaction. A shift in blood pH by 0.4 ÷ 0.5 (especially to the acidic side) leads to severe dysfunctions of the body. In most body cells, the pH is a little over 7.0. So, scientists set strict boundaries for the pH of drinking mineral water: from 6.5 to 8.5. Can mineral water with a concentration of Na2CO; 0.1 M be used as drinking water? (acidity constants of carbonic acid H2CO, Kai = 4:107, Ka2 = 5:101")