What is the pH value of 0.1 mol/L HA solution? pKa (HA) = 5.0 ( )
A: 6.0
B: 8.0
C: 7.0
D: 9.0
A: 6.0
B: 8.0
C: 7.0
D: 9.0
举一反三
- 用0.1000 mol‧L-1 NaOH滴定0.1000 mol‧L-1 pKa = 4.0的弱酸HA的突跃范围为pH 7.0~9.7,若HA的pKa = 5.0,则突跃范围为 ( ) A: 8.0~9.7 B: 6.0~9.7 C: 7.0~8.7 D: 8.0~8.7
- 用0.1000mol/L的NaOH滴定0.1000mol/L的弱酸HA(pKa=4.0)其pH突跃范围是7.0~9.7,若弱酸的pKa=3.0,则其pH突跃范围为: A: 6.0~10.7 B: 6.0~9.7 C: 7.0~10.7 D: 8.0~9.7
- (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?
- 用NaOH滴定某弱酸HA,若两者浓度相同,则当滴至50%时,溶液pH=6.00,则该弱酸的pKa为( )。 A: 6.0 B: 9.0 C: 8.0 D: 5.0
- 霉菌和酵母菌的生长的PH范围是() A: 7.0~8.0 B: 3.0~6.0 C: 5.0~6.0 D: 6.0~9.0