Dung dịch Ba(OH)2 có pH = 13 (dung dịch A). Dung dịch HCl có pH = 1 (dung dịch B).
a. Tính CM của A và B? (xem Ba(OH)2 điện li hoàn toàn ở cả 2 nấc)
b. Trộn 2,25 lít dung dịch A với 2,75 lít dung dịch B. Tính pH của dung dịch thu được.
Complete the sentences without changing their meanings.
1. It is important for all family members to discuss the rules.
All family members...
2. It is good idea for young children to receive lots of encouragement to follow family rules.
Young children...
3. Children feel safe and secure with the daily routines.
The daily routine...
4. It is a good idea to hold an informal family meeting to give family members a chance to suggest better ways to share household chores.
We...
5. My parents never refuse to allow me to take part in social activities at school and at the community.
I am...