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2 years ago

What reagent is used to detect the presence of starch?

Chemistry

1 answer:

LenaWriter [7]2 years ago

3 0

Answer:iodine solution

Explanation: it is because in the presece of starch iodine will turn blue/black

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Please help me with this science

MAVERICK [17]

The answer is no. 5 grams are equal to 5 milligrams.

"Milli" means million so a milligram is one-millionth of a gram.

6 0

3 years ago

A group of engineers has created a biodome filled with air, plants, and animals. No material can get in or out, but sunlight can

trapecia [35]

Thx for the points lol

6 0

2 years ago

11C. Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solut

Llana [10]

For the reactants,

The oxidation number of hydrogen = +1
The oxidation number of oxygen = -2
The oxidation number of arsenic = +5
The oxidation number of carbon = +3

For the products,

The oxidation number of hydrogen = +1
The oxidation number of oxygen = -2
The oxidation number of arsenic = +3
The oxidation number of carbon = +4

Here, arsenic (+5 to +3) and carbon (+3 to +4) are the only oxidation numbers changing.

Note that an increase in oxidation number means electrons are lost. Thus oxidation is occurring, and a decrease in oxidation number means electrons are being gained, and thus reduction is occurring.

Also, the compound that contains the element being oxidized is the reducing agent, and the compound that contains the element being reduced is the oxidizing agent.

So, the answers are:

name of the element oxidized: Carbon

name of the element reduced: Arsenic

formula of the oxidizing agent: $\text{H}_{3}\text{AsO}_{4}$

formula of the reducing agent: $\text{H}_{2}\text{C}_{2}\text{O}_{4}$

6 0

1 year ago

How many kilograms of potassium iodide (ki) are needed to make 1.25 l of a 4.41 m ki solution?

Lapatulllka [165]

C = n/V
n = C×V
n = 4,41M × 1,25L
n = 5,5125 mol

mKI: 39+127 = 166 g/mol

1 mol --------- 166g
5,5125 mol --- X
X = 166×5,5125 = 915,075g KI

:)

7 0

3 years ago

A square table has an area of 400 square feet. They want to cut the table into two equal rectangles. If they cut the table in ha

Orlov [11]

Answer:

b=200

l=100

Explanation:

so since it is a square all sides would be equal

when you cut the square vertically the dimensions will change

the bredth would be same that is 200

but the length would be half that is 100

7 0

3 years ago