I m looking for a set of questions to practice 10

Brothers: How many classes? The answer is to share the sprinkle!

1 Concentration of substance: The amount of solute contained in a unit volume solution Unit: mol l

2, short answer 1 Salt spraying on the road surface can reduce the freezing point of water, thereby preventing freezing.

Fill in the blank 1 Glucose is a non-electrolyte, NAAC and BASO4 are strong electrolytes, HAC is a weak electrolyte, and BASO4 is a strong electrolyte that is difficult to dissolve.

The conjugated acid of 2H2O is H3O and the conjugate base of H2O is OH.

4 Buffer solution: HAC Naac, NH3H2O NH4Cl

5 Properties of buffer solution: The rate of change of pH is very small when acid and base are applied.

6. Add sodium acetate to the acetic acid solution, at this time, the ionization degree will become smaller, and the ionization constant ka of acetic acid will not change.

7.The relationship between the conjugated acid-base pairs between ka and kb is : ka kb kw

8.Ion product QC9The concentration is a mixed solution of Cl-, Br-, and I-, all of which are mol L-1, and Agno3 solution is added dropwise, and the precipitate sequence is I-, Br-, and Cl-

The first short-answer question upstairs did not answer the main point, in the rain, snow and freezing weather, often sprinkle salt on the road surface to prevent the road from freezing, and the question requires that the acid-base balance and precipitation dissolution balance knowledge explain the reason, ·· Also, the buffer pair of question 4 is not written like this, it is not standardized... Everything else is correct.

To be honest, these are very basic, find the answers in the book, except for the lower 2 questions, the calculation questions are the original questions in the book to change the data (such as the ka of HAC, the data in the book is the ka of HAC.

Let's look for it in the book.

1. Dial and intercept the concern.

2. The old mother was anxious: "You already have a cold, don't you?" Why are you so disobedient! I didn't like to add clothes since I was a child! ”…

3. (1) Sound.

2) Impatience.

Hurry up and stop it. 4. It is the son who cares about him, and the mother who cares about him. Parents always care more about their children than they do about their parents. Family affection is always passed on to the next generation, and rarely in reverse.

5. Family affection is always passed on to the next generation, and rarely passed on in reverse. Parents are always concerned about their children, and their children are always impatient, no matter how old the child is, in the eyes of the parents, they will always be the child, and they will always be concerned.

6. Family affection is priceless and the most worthy of our cherishment. We can give up love, we can lack friendship, but we must not give up family affection, a person who does not cherish family affection, there must be some kind of defect in his character. Reference: Original.

Intelligence questions, IQ test. How many squares are there?

16 + 9 + 4 + 5 + 5 + 1 = 40 (pcs).

Test everyone: This is a math problem that can be used to test whether a person has business acumen or not. Master Wang is selling fish, a pound of fish at a price of 45 yuan, now a big sale at a loss, the customer bought a kilogram for 35 yuan, gave Master Wang 100 yuan fake money, Master Wang has no change, so he asked his neighbor Liang Blind for 100 yuan.

Afterwards, the neighbor found out that the money was fake in the process of depositing money, and it was confiscated by the bank, and Master Wang lost 100 yuan to the neighbor, how much did Master Wang lose in total?

Note: The difference between catties and kilograms.

A total loss of 100 + (45 2-35) = 100 + 55 = 155 yuan.