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English 18 Public

Acids-Alkalis Grade 7

Study Slideshow

Have a soapy, slimy feel. The statement refers to...

Alkalis

A substance that releases hydrogen ion (H+) when added to water. The characteristic refers to...

Acid

Which of the solution is alkalis?

Patrick was doing a test to solution and the result shows in the picture. It means that the solution is an...

Alkalis

Three solution was tested using red cabbage indicator with the result showed in the picture. Solution B belong as...

neutral

A solution has bitter taste and caustic. This solution belong as....

Alkalis

pH value of strong acid is...

0-2

pH value for weak alkalis is...

8-11

Type of Acid produced by mammalian stomach is....

Hydrochloric acid

Type of acids that contain in orange or lemon is....

Citric acid

when an acid reacts wit an alkali, the .............. reaction happen

neutralisation

Two product of the reaction in the picture are...

NaCl and H2O

Product of the reaction is....

NaNO3 + H2O

Neutralisation reaction only work from acidic pH to neutral pH, while alkali pH will stay in its value. Is the statement true or false?

False

A bee sting is acidic, we can use an alkalis toothpaste or soap to cure. Is the statement true or false

true

Sodium bicarbonate in antacid drugs can cure indigestion caused by stomach acid. Is the statemnet true or false?

true