Plan: Text. Vocabulary. Question. Grammar exercises

Limitations of the Arrhenius Definition
The Arrhenius definitions of acidity and alkalinity are restricted to aqueous solutions and refer to the concentration of the solvated ions. Under this definition, pure H₂SO₄ or HCl dissolved in toluene are not acidic, despite the fact that both of these acids will donate a proton to toluene. In addition, under the Arrhenius definition, a solution of sodium amide (NaNH₂) in liquid ammonia is not alkaline, despite the fact that the amide ion (NH−2NH2−) will readily deprotonate ammonia. Thus, the Arrhenius definition can only describe acids and bases in an aqueous environment.
Arrhenius Acid-Base Reaction
An Arrhenius acid-base reaction is defined as the reaction of a proton and an hydroxide ion to form water:
H++OH−→H2OH++OH−→H2O
Thus, an Arrhenius acid base reaction is simply a neutralization reaction.

Vocabulary:

Strong acids	Kuchli kislotalar
Corrosive	Korroziya
Covalent bond	Kovalent bog’kanish
Sulfuric acid	Sulfat kislota
Citric kislota	Vino kislotasi
Lewis acids	Lyuis kislotasi
Vacant orbital	Bo’sh orbital
Dissociation	Ajralish
Polyprotic acids	Poliprotik kislotalar
Applications of acids	Kislotalarningqo’llanilishi
External links	Tashqi bog’lanishi
References	Esga olish
Buffer solutions	Buffer eritmalar
Inorganic acids	Anorganik kislotalar
Organic acids	Organic kislotalar
Acetic acids	Sirka kislotasi
Burning property	Kuydiruvchi xossali
Moderately strong acid	O’rta kuchli kislota
Weak acid	Kuchsiz kislota

Questions:

1. 
   What compound are called acids?
   
2. 
   Depending on the base , the acids are divided into several groups?
   
3. 
   Which is an acid called bread of the chemical industy?
   
4. 
   Give the name of the acid which is called the holding acid?
   
5. 
   Depending on the state of the aggregate, the acids are divided into several groups?
   
6. 
   Which acid solution is present in car batteries?
   
7. 
   Write the formula of which of the three strongest acids?
   
8. 
   The acid that is formed in the atmosphere during heavy rains in usually not to humans as it harms plants?
   

Grammar exercises:
Exercise on Future I Simple (will)

• 
  You (earn) a lot of money.
  
• 
  You (travel) around the world.
  
• 
  You (meet) lots of interesting people.
  
• 
  Everybody (adore) you.
  
• 
  You (not / have) any problems.
  
• 
  Many people (serve) you.
  
• 
  They (anticipate) your wishes.
  
• 
  There (not / be) anything left to wish for.
  

Началоформы Complete the sentences with the forms of to be in the present simple (am, is, are). 1. I  at home. 2. She  not at home in the morning. 3. We  in the park. 4. This  my new laptop. 5. Our friends  on their summer holidays. 6. Uncle George  a good football player. 7. The dog  under the table. 8. He  very funny. 9. The shoes  white. 10. You  right. 11. Susan  good at tennis. 12. They  in the house. 13. His T-shirts  cool. 14. My sister  a good swimmer. 15. She  in Italy. Конец формы

Put the verbs into the correct form (future I). Use going to.

1. 
   It (rain)  .
   
2. 
   They (eat)  stew.
   
3. 
   I (wear)  blue shoes tonight.
   
4. 
   We (not / help)  you.
   
5. 
   Jack (not / walk)  home.
   
6. 
   (cook / you)  dinner?
   
7. 
   Sue (share / not)  her biscuits.
   
8. 
   (leave / they)  the house?
   
9. 
   (take part / she)  in the contest?
   
10. 
    I (not / spend)  my holiday abroad this year.
    

Put the verbs into the correct form (simple past).

1. 
   Last year I (spend)  my holiday in Ireland.
   
2. 
   It (be)  great.
   
3. 
   I (travel)  around by car with two friends and we (visit)  lots of interesting places.
   
4. 
   In the evenings we usually (go)  to a pub.
   
5. 
   One night we even (learn)  some Irish dances.
   
6. 
   We (be)  very lucky with the weather.
   
7. 
   It (not / rain)  a lot.
   
8. 
   But we (see)  some beautiful rainbows.
   
9. 
   Where (spend / you)  your last holiday?