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
flagFinland
12%
81%
6%
0%
16
flagAzerbaijan
7%
78%
7%
7%
14
flagNorway
13%
69%
8%
8%
36
flagItaly
15%
66%
9%
9%
33
flagPoland
20%
64%
6%
7%
15067
flagGermany
16%
64%
9%
9%
165
flagBelgium
25%
62%
12%
0%
16
flagIndia
24%
60%
7%
7%
237
flagthe Netherlands
24%
60%
9%
5%
53
flagRepublic of Ireland
19%
58%
9%
11%
51
flagthe United Kingdom
25%
57%
7%
8%
405
flagSpain
23%
57%
4%
9%
21
flagFrance
33%
44%
8%
13%
36
flagCanada
45%
43%
4%
4%
44
flagAustralia
35%
43%
12%
7%
39
flagMalaysia
39%
43%
4%
13%
23
flagSweden
56%
43%
0%
0%
16
flagthe United States
40%
41%
7%
8%
510
flagPakistan
52%
39%
8%
0%
23
flagthe Philippines
37%
29%
25%
7%
27

Gender

men51%
women57%
citric acid
28%
24%
malic acid
52%
57%
lactic acid
7%
9%
formic acid
11%
8%

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