Ответ учителя по предмету Химия
1. Кислоты: H2CO3
2. Основания: растворимые: KOH. Нерастворимые: Mg(OH)2, Al(OH)3, Cu(OH)2
3. Соли: растворимые: K3PO4, K2S, BaCl2, CuBr2. Нерастворимые: Нет
4. Основные: MgO, K2O, CuO
Амфотерные: Al2O3, BeO
Кислотные: P2O5, CO2
H2PO4 — кислотный остаток
Похожие вопросы от пользователей
1 I’m busy today, but have………….. time to spare tomorrow.
2…..people understand international politics, although a lot of people study the subject.
3 There’s no brandy left, but you can have…………………….. wine.
4 There’s ……………. hope of finding the lost men now
5 It was very cheap. It only cost ………….. pounds
6 Most guests left early, but there were still …………… people there at midnight.
7 ……….. of us have any idea what he was talking ABOUT
8 He had …………. interest in any kind of sport.
III. Add ‘the’ in the spaces where necessary.
1 ………United Kingdom includes………….. Great Britain and Northern Ireland.
2 John took a train from ………………………. Waterloo Station and read Times on journey
to ………. south coast of …………….. England.
3 He stayed the night in…………..Grand Hotel, which is in …………. Brook Street in center
of ……………………. Southampton.
4 His ship …. Queen’s Star …………. sailed next morning down …. English Channel
towards ………… Atlantic Ocean.
5 They passed ……….. Channel Islands and John recognized …………….Jersey, an island he
had once visited.
IV. Put the verb in brackets in the correct form.
l. The date of the meeting (change), so you don4 have to come at 5.
2.My friend (call) ________ when I (have) shower, so I couldn’t answer the
phone. З.Тот (teach)__________ how to drive when he was 17, so he is an expert driver
now.
4.Sam never (be) ____ late for work since he came to our company.
5.Did it rain yesterday? — Yes, thanks God. It (not rain) for more than a month, so we were worried about the crops.
6. Did it rain yesterday? — No, it (not rain) for more than a month now. 7.1 was assured that when they (arrive) the next day, everything (be) all right.
8. Are you ready to answer? — I’m sorry, professor. I (be)__________ready in a minute. I (not finish) the last point yet.
9.1 hear you arc leaving the firm.- Yes, I (offer) a good «