Is it possible to identify HCl solution and H2SO4 solution with AgNO3 solution? Why is BaSO4 the best? Explain the principles

Is it possible to identify HCl solution and H2SO4 solution with AgNO3 solution? Why is BaSO4 the best? Explain the principles

No, because silver nitrate and sulfuric acid will form slightly soluble silver sulfate, and most of the formed silver sulfate will be released in the form of precipitation, which will interfere with the detection of chloride ion.
Therefore, to use barium chloride, only with sulfuric acid to form barium sulfate precipitation, can not react with hydrochloric acid,

Surface area formula of cone I want to connect a 2m-high cone on a 5m-diameter cylindrical drum. How can I finish this cone? Surface area formula of cone I want to connect a 2m-high cone on a 5m-diameter cylindrical iron drum. How do I finish this cone?

You studied cone surface area =1/2*LR No
If the cone is above the cylinder, then the diameter of the cylinder is the diameter of the cone, then the circumference of the bottom of the cylinder is equal to 2πr =2π*5/2=5π. L =5π. R is the length of the bus = under the root sign (square of 2+ square of 5/2)
Then bring in the formula cone surface area =1/2*LR.
You can show the picture before you look at it.

You studied cone surface area =1/2*LR No
If the cone is above the cylinder, then the diameter of the cylinder is the diameter of the cone, then the circumference of the bottom of the cylinder is equal to 2πrπ*5/2=5π. L =5π. R is the length of the bus = under the root sign (square of 2+ square of 5/2)
Then bring in the formula cone surface area =1/2*LR.
You can show the picture before you look at it.