Người ta chuẩn độ 10ml Na2CO3 0,01M bằng HCl 0,1M. Cho biết axit yếu CO2.aq có pK1 = 6,4; pK2 = 10,2.
a. Tính Ve(ml) là thể tích HCl cho vào dung dịch Na2CO3 ứng với điểm tương đương
thứ nhất.
b. Đặt x =
Ve
V
; V là số ml HCl cho vào dung dịch Na2CO3. Lập biểu thức pH = f(x) khi
x = 0; 0 < x < 1; 1 < x < 2; x = 2 và x > 2

3.) for each of the following compounds, draw the major organic product of reaction with hcl or naoh and circle whether the starting materials and products will be more soluble in organic solvent or water benzoic acid + hcl: benzoic acid + naoh: oh benzoic acid water/organic water organic fluorenone hс: fluorenone + naoh: fluorenone water/organic water/organic веnzocaine + hci: benzocaine + n»oh: h2n benzocaine water/organic water organic o=

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.

What energy is it when you flip on a switch on a lamp