Chemistry Test Acids
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Name: ________________________________________________ Subject: Chemistry Form: ________________________________________________ Date: _______________________________________________ 1. What has a scale that measures from 0 to 14, with 0 being acidic and 14 alkaline? a. pH b. salinity c. bio-indicators d. dissolved oxygen 2. A strong base is characterized by which of the following? a. a high pH b. a low pH c. hydrogen in the formula d. turns litmus blue 3. A reaction between an acid and a base is called ? a. Buffer b. Alkaline c. Neutralization d. Acid Rain 4. The number that indicates a neutral pH. a. 0 b. 5 c. 7 d. 10 5. Which is the most acidic pH? a. 2.5 b. 3.5 c. 4.5 d. 5.5
description
Chemistry test on acids and bases. suitable form third form chemistry or introductory form 4
Transcript of Chemistry Test Acids
Name:________________________________________________Subject: ChemistryForm: ________________________________________________Date: _______________________________________________
1. What has a scale that measures from 0 to 14, with 0 being acidic and 14 alkaline?a. pHb. salinityc. bio-indicatorsd. dissolved oxygen
2. A strong base is characterized by which of the following?a. a high pHb. a low pHc. hydrogen in the formulad. turns litmus blue
3. A reaction between an acid and a base is called?a. Bufferb. Alkalinec. Neutralizationd. Acid Rain
4. The number that indicates a neutral pH.a. 0b. 5c. 7d. 10
5. Which is the most acidic pH?a. 2.5b. 3.5c. 4.5d. 5.5e. 6.5
6. Bases can often feel.a. Fuzzyb. Roughc. Moldyd. Slippery
7. What is the pH of a strong alkali?a. 6b. 7c. 14d. 1
8. Acidic solutions contains high concentrations ofa. H+ ionsb. OH- ionsc. Waterd. Oxygen
9. If a soil is too acidic, what should the farmer add?a. Compostb. Calcium oxidec. vinegard. Water
10. Which chemical is a strong acid?a. Sodium hydroxideb. Sulphuric acidc. Calcium hydroxided. Potassium hydroxide
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11. Study the following diagrams showing a set of simple experiment carried out using a named acid. (i) Hydrochloric acid is a strong acid. What colour would be expected when tested with Litmus paper. __________________________________________________________ (ii) Copper sulphate solution is neutral. What is its pH? ___________________________________________________________ (iii) Which set of apparatus A, B or C will produce a gas? ___________________________________________________________ (iv) Name the gas produced. _________________________________________________________[4]
12. Complete the acid reactions given below:a. Hydrochloric acid + calcium = __________________________ + hydrogen gas. [1]Write the chemical equation to represent what is written above.[4]
b. Sulphuric acid + sodium carbonate = ____________________ + ____________ + water.[2]Write the chemical equation to represent what is written above.[4]
13. You are provided with four solutions A, B, C and D which have different pH values as listed below.A. Ph7B. Ph1C. Ph9D. Ph5Classify the solutions, a) to d) stated above, as either weakly alkaline, strongly alkaline, neutral, strongly acidic or weakly acidic. [4]A. ___________________________________________B. ___________________________________________C. ___________________________________________D. ___________________________________________i. Which solution could be pure (distilled) water. [1]_____________________________________________ii. Which solution(s) will turn pink if phenolphthalein is added[1].______________________________________________iii. Between which two solutions will a neutralization reaction occur. [1]______________________________________________
Complete the following sentences by inserting the missing word. [3]14. Coffee and cocoa taste bitter because they contain_______________.15.____________________ litmus paper is used to test acids.16.The sting of a wasp is _____________ so can be neutralized with vinegar.
