Generally, it is called residual acid when the acid concentration is reduced to what percentage of the initial concentration.
A: 5
B: 10
C: 15
D: 20
A: 5
B: 10
C: 15
D: 20
举一反三
- A buffer solution must contain a relatively large concentration of acid and a similar concentration of base.
- The main difference between interstitial fluid and plasma is A: The protein concentration is higher in plasma B: The Na+ concentration is higher in plasma C: The protein concentration is higher in interstitial fluid D: The Na+ concentration is higher in interstitial fluid E: The organic acid concentration is higher in plasma
- (1) The weak monoprotic acid HA is 2.5% dissociated in 0.10 mol·L-1solution. What is the acidity constant, Ka, of HA?(2)A certain solution of HA has a pH=2.51. What is the concentration of the solution?
- If a drug with t1/2 3 hours is given intravenously, the blood concentration will drop below 5% of the initial concentration within: A: 6 h B: 9 h C: 15 h D: 25 h E: 30 h
- Which of the following groups ( ) can be used as metrics to manage climate change A: Acid gas emissions, atmospheric hydrogen ion concentrations, reduction of acid gases B: Heavy metal emissions, heavy metal concentrations in soil, recovery of heavy metal scraps C: Nitrogen emissions, nitrogen concentration in water, investment on nitrogen removal equipment D: GHGs emissions, atmospheric GHGs concentration, energy consumption intensity