Calculation of molar ratios of conjugate base to weak acid from ph for a weak acid with a pka of 6.0, calculate the ratio of conjugate base to acid at a ph of 5.0.

choice of weak acid for a buffer which of these com-pounds would be the best buffer at ph 5.0: formic acid (pka 5 3.8), acetic acid (pka 5 4.76), or ethylamine (pka 5 9.0)? briefly justify your answer.

What is the main reason why some developing countries fear the increase the free trade policies around the world?

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative