Физика, 8 класс

 Fill in the prepositions where it is necessary.

This writer is known all ... the world. Many people are fond ... his books. I read one of his novels ... a month ago. He tells his stories ... such a way that you remember them ... a long time. Although his characters are imaginary it always seems that they live ... real life. ... the beginning of the year they made a trading expedition ... Africa. Crusoe left ... saying good-bye to anyone. ... his way ... London he had his first experience ... a shipwreck. The ship ran ... a rock and broke ... pieces. The sailors were swallowed…the sea

1.Степень диссоциации раствора салициловой кислоты с концентрацией 0,1 моль/л составляет 1,2%.

Рассчитайте константу диссоциации кислоты.

2.К 200 мл раствора аммиака концентрацией 0,25 моль/л, 150 мл раствора

соляная кислота с концентрацией 0,10 моль/л. Рассчитать рН исходных растворов и раствора

полученный. К(NH 4 ОН)=1,76∙10 -5