Give examples of using neutralization reaction in life

For example, using acetic acid to clean the dirt or rust in the kettle belongs to acid-base neutralization reaction

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1. Given the parallelepiped abcd-a'b'c'd '. Find the vector AC' + the vector d'b-the vector DC
2. Bo is the middle line on the hypotenuse of right triangle ABC, extend Bo to point D, make Bo = do, connect ad CD, prove that quadrilateral ABCD is a rectangle
3. Senior high school mathematics compulsory 5 chapter 3 inequality review reference questions answers
4. When a farm is building water conservancy, 48 people are sent to complete the work of digging and transporting soil. If each person digs 5 cubic meters of soil or transports 3 cubic meters of soil on average every day, how to allocate the number of people to dig and transport soil so that the excavated soil can be transported away in time?
5. When a farm is building water conservancy, 48 people are sent to complete the work of digging and transporting soil. If each person digs 5 cubic meters of soil or transports 3 cubic meters of soil on average every day, how to allocate the number of people to dig and transport soil so that the excavated soil can be transported away in time?
6. When a farm is building water conservancy, 48 people are sent to complete the work of digging and transporting soil. If each person digs 5 cubic meters of soil or transports 3 cubic meters of soil on average every day, how to allocate the number of people to dig and transport soil so that the excavated soil can be transported away in time?
7. A group of migrant workers participate in the excavation and transportation of soil for water conservancy projects. On average, each person digs 5 cubic meters or transports 3 cubic meters of soil every day. If 24 people are arranged to dig and transport soil, it is necessary to A group of migrant workers participate in the excavation and transportation of soil in water conservancy projects. On average, each person digs 5 cubic meters of soil or transports 3 cubic meters of soil every day. If 24 people are arranged to dig and transport soil, they should be arranged____ People dig____ When people transport soil, the excavated soil will be transported away in time Countable system of linear equations of two variables Understand it completely
8. A group of migrant workers participate in the excavation and transportation of soil at the construction site. On average, each of them digs 5 cubic meters or transports 3 cubic meters of soil every day. If 24 people are arranged to dig and transport soil, they should be arranged______ Only when people transport the soil can the excavated soil be carried away in time
9. A group of migrant workers participate in the excavation and transportation of soil at the construction site. On average, each of them digs 5 cubic meters or transports 3 cubic meters of soil every day. If 24 people are arranged to dig and transport soil, they should be arranged______ Only when people transport the soil can the excavated soil be carried away in time
10. The following formulas are given: 32-12 = 8 = 8 × 1, 52-32 = 16 = 8 × 2, 72-52 = 24 = 8 × 3, 92-72 = 32 = 8 × 4 If you look at the above series of formulas, what rules can you find? Express this rule with algebraic formula
11. A regular hexagon is divided into eight parts of equal area This is a mathematical modeling problem, can not be measured
12. A mathematical problem of linear equation with one variable If you plant 10 saplings per person, there will be 6 saplings left; if you plant 12 saplings per person, there will be 6 saplings missing. How many people plant trees?
13. A plan of rectangular foundation is drawn on a 1 / 2000 scale drawing. How many square meters is the actual floor area of this foundation? Please write a formula
14. Arrange 3 ^ - 55,4 ^ - 44,5 ^ - 33 from small to large
15. If △ ABC ∽ a'b'c ', BC; b'c' = 2; 3, the sum of their circumferences is 15 and the difference of their areas is 20, find the respective circumferences and areas of the two triangles
16. The lower part of a trapezoid is three times the upper part. The upper part is extended by eight centimeters to form a parallelogram with an area of 288 square centimeters. The area of the original trapezoid is calculated
17. What is the probability that the distance between P and each surface area of the cube is greater than 3 / a if we randomly take a point P in the cube ABCD ABCD with edge length a
18. If we know that the sum of the two right sides of a right triangle is equal to 8 and what are the two right sides, what is the maximum area of the right triangle?
19. How to prove that a graph is centrosymmetric, congruent or other?
20. There are 324 squares on a go board, each with a piece If the result of the game is: Black accounts for half of the total, white accounts for a quarter of the total. Then who wins the game?