The sight of ordinary salt dissolved in water is, in all likelihood, entirely familiar to you, as the phenomenon literally dominates the globe. Over two-thirds of Earth's surface is covered by ocean water, which is notably saline, or "salty," in character. ("Sal" is the Latin word for...
B. It dissociates into sodium ions and chloride ions. C. It turns into gas. D. It remains unchanged. 相关知识点: 试题来源: 解析 B。中文解析:“When salt is dissolved in water, it dissociates into sodium ions and chloride ions.”,盐溶解在水中会解离成钠离子和氯离子。反馈 收藏 ...
I am doing an experiment. I need a glass of water, a spoon and some salt. What should I do first? A. Add salt to the water. B. Put the spoon in the water. C. Pour water into the glass. 相关知识点: 试题来源: 解析 C。首先应该把水倒进杯子里,这是进行实验的第一步。A 选项把...
The simplest example of a molten salt would be to heat sodium chloride ("table salt") to a red heat (greater than 801° C, or 1474° F)1 upon which it wouldmelt into a liquid. This liquid is stable, has a heat capacity similar to water (by volume) and flows much like water doe...
What will happen when you mix ammonia and epsom salt? Why does the vapor pressure of water decrease when NaCl is added to it? What happens when water is softened? What happens to the boiling point when sugar is added to water? Explain. ...
Yes, salt mining and excessive use in areas near water bodies can lead to water pollution and soil degradation. 7 Why is salt important in food preparation? Salt enhances flavor and preserves food by inhibiting microbial growth. 6 How does salt affect water systems? Salt can increase the salin...
C. Take out the salt. D. Add more water. 相关知识点: 试题来源: 解析 B。本题考查对科学实验步骤的理解。A 选项把杯子放在太阳下与这个实验步骤无关;C 选项拿出盐不符合实验下一步;D 选项再加更多的水也不是下一步。B 选项搅拌混合物是在加水和加盐后合理的下一步。反馈 收藏 ...
A. Put in more water. B. Stir it well. C. Add more salt. D. Take out the salt. 相关知识点: 试题来源: 解析 B。首先,题干描述了先在杯子里放水,然后加盐,接下来应该搅拌均匀。A 选项再加入更多的水不符合下一步的步骤;C 选项再加盐也不是接着的步骤;D 选项把盐拿出来更不对。只有 B 选项...
Can you speculate the outcome of the following question: 'How does temperature affect how long it takes for salt to dissolve'? What happens when proteins fold and what causes it? A coffee cup calorimeter initially contains 65 g of water, at a temperature of 27.2 deg. C. Potassium bromide ...
Learn whether or not salt is soluble in water. Understand what happens when salt dissolves in water and predict the NaCl solubility by using a salt...