All of the following are physical properties except a. density b. colour c. reaction with oxygen d. melting point

Chemistry

2 answers:

Crank1 year ago

7 0

C! That’s a chemical change :)

denpristay [2]1 year ago

4 0

Answer:

Explanation:

a, b and d are physical properties ..... the compound or element in question has not changed its identity

c when combined with oxygen, it has changed to a different compound via CHEMICAL property.

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Only some particles split up into smaller particles

Makovka662 [10]

Answer:

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Explanation:

4 0

3 years ago

(a) a 0.2 m potassium hydroxide solution is titrated with a 0.1 m nitric acid solution. (i) balanced equation: (ii)what would be

Stells [14]

$\text{KOH} (aq) + \text{HNO}_3 (aq) \to \text{KNO}_3 (aq) + \text{H}_2\text{O} (l)$

The solution shall contain only $\text{KNO}_3 (aq)$ (and water) at the equivalence point. Both potassium hydroxide and nitric acid exist as strong electrolytes. As a result, $\text{KNO}_3 (aq)$ , the salt derived from a reaction between the two species would undergo hydrolysis of a negligible extent. This neutralization reaction therefore be neutral at the equilibrium point.

The question states that the solution is "titrated with a ... nitric acid solution" indicating that $\text{HNO}_3$ is added to the initially-basic solution. PH value of the solution would keep decreasing as the volume of the acid added increases. The final solution would be acidic as it contains not only water and $\text{KNO}_3 (aq)$ , but some $\text{HNO}_3$ as well. Bromothymol blue would therefore demonstrates a yellow color, the color it present in an acidic solution, at the end of the titration.