17. What concentration of HF (Ka = 7.2×10–4) has the same pH as that of 0.068 M HCl? (A) 0.068 M (B) 0.16 M (C) 6.4 M (D) 0.011 M

18. A calorimeter contains 123 g of water at 27.0°C. A block of metal with a mass of 28 g is heated to 95.8°C and then placed in the water in the calorimeter. After sufficient time, the temperature of the water is measured and found to be 28.8°C. Calculate the heat capacity per gram of metal. Assume no heat is lost to the calorimeter or the surroundings. (A) 2.0 J/g°C (B) 0.12 J/g°C (C) 6.8×102 J/g°C (D) 0.49 J/g°C

17. What concentration of HF (Ka = 7.2×10^–4) has the same pH as that of 0.068 M HCl?
(A) 0.068 M
(B) 0.16 M
(C) 6.4 M
(D) 0.011 M

相關試題

相關試卷

17. What concentration of HF (Ka = 7.2×10–4) has the same pH as that of 0.068 M HCl?(A) 0.068 M(B) 0.16 M(C) 6.4 M(D) 0.011 M

相關試題

相關試卷

17. What concentration of HF (Ka = 7.2×10^–4) has the same pH as that of 0.068 M HCl?
(A) 0.068 M
(B) 0.16 M
(C) 6.4 M
(D) 0.011 M