Which acid causes the sourness of green apples?

citric acid
malic acid
lactic acid
formic acid
Malic acid is more sour than citric acid, and is the source of extreme tartness in so-­called extreme candy. Malic acid occurs nat­u­ral­ly in all fruits and many veg­eta­bles.

Answers distribution

citric acid
malic acid
lactic acid
formic acid
answers
flagNorway
11%
65%
9%
13%
44
flagPoland
20%
64%
6%
7%
21524
flagGermany
17%
64%
9%
7%
224
flagItaly
19%
61%
9%
9%
42
flagAustria
27%
61%
0%
11%
18
flagSpain
20%
60%
4%
12%
25
flagthe United Kingdom
26%
56%
7%
8%
562
flagIndia
27%
55%
7%
8%
321
flagFrance
23%
55%
6%
14%
63
flagthe Netherlands
25%
54%
7%
12%
64
flagRepublic of Ireland
23%
53%
9%
14%
64
flagUnknown
28%
52%
6%
12%
887
flagUkraine
28%
52%
4%
14%
21
flagCanada
42%
42%
3%
9%
52
flagthe United States
41%
41%
7%
7%
615
flagSweden
45%
41%
8%
4%
24
flagMalaysia
48%
37%
3%
11%
27
flagAustralia
43%
36%
13%
6%
46
flagPakistan
53%
35%
7%
3%
28
flagthe Philippines
47%
26%
20%
5%
34

Gender

men51%
women55%
citric acid
27%
25%
malic acid
51%
55%
lactic acid
7%
9%
formic acid
12%
8%

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Which acid causes the sourness of green apples?
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Author: Kasia
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