A Solid Substance Was Tested In The Laboratory
Solid objects accumulate in the corridor. The test results are as follows:
Water soluble
Electrolyte
Melts at high temperatures
Based on these results, can be solid.
1. Q.
2. CuBr2
3. C.
4.C6H12O6
Answer 2 Why?
I totally agree with Thinkstouch's answer.
Solid Cu, C is insoluble in water. As long as glucose and CuBr2 are soluble in water. The solubility of glucose (C6H12O6) in PBS is 90 g / ml, thus eliminating cycles 1 and 3.
When a mixture ions into the soil, it produces an electrolyte. Glucose is not ionized, but CuBr2 is ionized into Cu ++ and 2Br, Cice 4 can be removed.
There is a third indication to confirm your answer, and as an ionic compound, CuBr2 has a relatively high melting point. 498 ° C Accuracy.
Obviously, Cu Bromide should be your answer.
I think it helps.
Water soluble: cices 1,3,4 have no meaning and since CuBr2 is a soluble solid, it dissolves in H2O.
Electrolytes: These are substances that break down electrolytes when dissolved, so n.2 is the only thing that makes sense.
Melts at high temperatures. Ionic bonds are the strongest bonds and require very high temperatures to break. A CuBr2
Because CuBr2 is soluble in ions and water. It is salt, which means solid. As an ionic compound, it contains ionic bonds that cause high melting temperatures.
Cu does not dissolve in water. C. E C6H12O6 is not an electrolyte.
