Give explanations that why this answer is correct and explan why the others are wrong.
1. Which of the following compounds is the most suitable under the effect of heat?
A. KNO3
B. K2CO3
C. K2SO4
D. KHCO3
A Chemistry MC Question
2008-01-19 7:56 pm
回答 (1)
2008-01-23 7:51 pm
✔ 最佳答案
In CE, carbonate, hydrogencarbonate, hydroxide and oxide will be decomposed by heat. Thus, B and D are false.Compared the charge of NO3 and SO4, NO3 is -1 and SO4 is -2, the ionic strength between K and SO4 will be larger and hence C is the answer.
Here are their melting point:
A. KNO3 - 334C
B. K2CO3 - 891C
C. K2SO4 - 1067C
D. KHCO3 - 100-120C
收錄日期: 2021-04-28 15:02:47
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