Question

英文的化学题目~~~高手!!!!!!!!!!!!!!!!

here are some measurements of solutions that were made using a pH meter.

A.8 B.9 C.6 D.3 E.7 F.10

(1)a bottle of soda powder solution has a pH of10. how do you think the pH would change when it is heated in the sunlight for several hour? why?

(2)if we put D and F together in a test tube, what would happen?

(3)list three chemicals whose pH are 7

Answer 1

翻译：以下是用PH计测出的一些结果
A.8 B.9 C.6 D.3 E.7 F.10

(1)一瓶PH值等于10的苏打水，为什么把它放在阳光下晒几个小时能使他的PH值发生改变呢？

加热后，或太阳暴晒一段时间后，水分蒸发并且温度升高，使氢离子浓度变化，PH值也发生变化

（2）如果我们把D和F倒在试管里混合，会有什么现象发生？

PH值会向6和10之间靠拢

（3）列出3种PH值等于7的化学试剂
常温下：蒸馏水，氯化钠溶液，硝酸钠溶液

Answer 2

(1)The pH of the solution will go up.
Cuz' the heat of sunlight will condense the
solution, the consistence of OH also goes up
which couse the PH going up\
(2)Neutral
(3)water salt(aq) kNO3(aq)

Answer 3

1.Na2CO3+H2O+CO2加热生成NaHCO3

2.有气泡产生
3.H20 NaCL BaCL2

Answer 4

(1)The pH of this solution will decrease because it will absorb carbon dioxide in the air.
(2)Neutralization will take place and water would be produced during this process.
(3)Water, sodium chloride, and potassium chloride are three examples whose pH are 7.

Answer 5

1.随着溶剂减少，溶液浓度变大，碱性增强，pH增大。尽管溶质电离程度增加，其总效果还是pH增加。
2.分情况：根据电解质的类型（强或弱电解质）和混合比例而不同。
3.氯化钠、氯化钾、硫酸钠溶液。

Answer 6

这是用PH试纸测出的一些溶液的PH.
A.8 B.9 C.6 D.3 E.7 F.10
（1）一瓶PH为10的苏打溶液.把它放在阳光下加热几小时你认为它的PH会怎样变化？
（2）如果把D和F加入同一只试管中，会是什么现象？
（3)列出三种PH为7的溶液。

（见笑了，希望对你有帮助～）